PrEP Guide

PrEP Guide: Understanding HIV Prevention Before Exposure

PrEP, short for pre-exposure prophylaxis, is a form of HIV prevention for people who do not have HIV but may have a possibility of being exposed to HIV. Unlike PEP, which is used after a possible HIV exposure, PrEP is taken or administered before potential exposure to reduce the chance of acquiring HIV. PrEP is an important part of modern HIV prevention because it gives people another option alongside condoms, regular HIV testing, STI screening, partner communication, and other prevention strategies. The World Health Organization recognizes multiple PrEP options, including oral PrEP and long-acting injectable approaches. WHO’s 2024 implementation guidance covers oral PrEP, the dapivirine vaginal ring, and long-acting injectable cabotegravir, while its 2025 guidance added twice-yearly injectable lenacapavir as another HIV-prevention option. Availability of specific products varies by country, healthcare system, regulatory approval, and individual circumstances. This guide explains PrEP in straightforward language so adults can understand:

• What PrEP means
• How PrEP works
• Who may consider PrEP
• Different PrEP options
• Oral PrEP
• Injectable PrEP
• HIV testing before PrEP
• Testing while taking PrEP
• Kidney monitoring
• Hepatitis B considerations
• STI testing
• Missed doses
• Starting and stopping PrEP
• PrEP and condoms
• PrEP and PEP
• Side effects
• Common misconceptions
• Privacy and stigma
• Questions to ask a healthcare professional
• Frequently asked questions

Important medical disclaimer: This page is for general education and does not replace medical consultation. PrEP should be started, changed, or stopped with appropriate healthcare guidance. Medication choice, dosing, testing, eligibility, interactions, monitoring, and availability can depend on your health history and the specific PrEP product available to you.

What Is PrEP?

PrEP stands for pre-exposure prophylaxis. It refers to antiretroviral medication used by people who do not have HIV to help prevent HIV infection before a potential exposure. The basic idea is simple: PEP = prevention after a possible exposure. PrEP = prevention before a possible exposure. PrEP is different from HIV treatment. A person living with HIV needs an appropriate HIV treatment regimen prescribed by a healthcare professional. PrEP is intended for people who do not have HIV and are using medication specifically to reduce their risk of acquiring HIV. Before starting PrEP, healthcare professionals need to establish that the person does not have HIV. This is important because taking an incomplete antiretroviral regimen when someone already has HIV can contribute to drug resistance. CDC guidance emphasizes HIV testing before PrEP and appropriate follow-up testing during PrEP use.

Why Is PrEP Important?

HIV prevention does not have to rely on a single method. People have different circumstances, relationships, preferences, schedules, and healthcare needs. Some people may find daily medication manageable. Others may prefer a long-acting injectable option where it is available and clinically appropriate. PrEP provides an additional prevention option. It can be particularly relevant for people who:

• Have a partner living with HIV whose viral suppression is unknown or inconsistent
• Have partners whose HIV status is unknown
• Have multiple partners
• Have experienced difficulty consistently using condoms
• Have had a recent STI
• Have concerns about HIV exposure
• Want an additional HIV prevention method
• Have circumstances that make HIV prevention more difficult
• Prefer a prevention strategy that does not depend entirely on condom use
• May benefit from long-acting prevention options

CDC guidance states that PrEP can be offered to people who request it, including people who may not report traditional HIV risk factors. That does not mean everyone needs PrEP. The decision should be based on an individual’s circumstances, medical history, preferences, and discussion with a qualified healthcare professional.

How Does PrEP Work?

PrEP uses antiretroviral medication to interfere with HIV’s ability to establish an infection. Different PrEP products use different medicines and delivery methods. Depending on the product and country, PrEP may involve:

• Daily oral medication
• Long-acting injectable medication
• Other approved or WHO-recommended PrEP technologies in particular settings

The goal is to have an effective level of preventive medication available when HIV exposure occurs. For oral PrEP, consistent use is particularly important. For injectable PrEP, protection depends on receiving injections according to the recommended schedule. The important principle is:

PrEP works as a prevention strategy when it is used correctly and consistently according to the prescribed regimen.

PrEP does not eliminate every form of sexual health risk. It is specifically designed to prevent HIV. It does not automatically prevent:

• Gonorrhea
• Chlamydia
• Syphilis
• HPV
• Herpes
• Hepatitis B
• Other STIs
• Pregnancy

Condoms and other prevention strategies may therefore remain important depending on your circumstances.

Is PrEP the Same as HIV Treatment?

No. This distinction is extremely important.

PrEP

PrEP is used by people who do not have HIV to reduce their risk of acquiring HIV.

HIV treatment

HIV treatment is used by people living with HIV to control the virus and protect their health. PrEP is not a substitute for HIV treatment. Before beginning PrEP, HIV testing is required to establish that the person does not have HIV. CDC guidance also recommends ongoing HIV testing while a person remains on PrEP.

Who Can Consider PrEP?

PrEP may be appropriate for adults who do not have HIV and may have a meaningful possibility of HIV exposure. Potential situations include:

1. A partner’s HIV status is unknown

If you have a sexual partner whose HIV status is unknown, a healthcare professional may discuss PrEP as one possible prevention option.

2. A partner has HIV

A person without HIV may use PrEP when their partner has HIV. However, the partner’s treatment and viral load are important considerations. People living with HIV who maintain an undetectable viral load through effective treatment do not sexually transmit HIV. This is commonly expressed as U=U — Undetectable = Untransmittable. Even in this situation, a person without HIV may still choose PrEP after discussing their circumstances with a healthcare professional.

3. Multiple sexual partners

People with multiple partners may encounter different HIV statuses and prevention circumstances. PrEP may be one option for reducing HIV risk.

4. Condom use is inconsistent

If condom use is difficult to maintain consistently, PrEP may provide another layer of HIV prevention. However, PrEP does not replace condoms for preventing many other STIs.

5. Previous STI diagnosis

Certain STI histories may indicate circumstances in which HIV prevention should be discussed. An STI does not automatically mean someone needs PrEP. A healthcare professional can help assess the broader situation.

6. Concern about HIV exposure

Someone does not need to wait until an HIV exposure occurs before learning about prevention. If you believe your circumstances may put you at risk of HIV, discussing PrEP with a healthcare provider can help you understand whether it is appropriate.

Who Should Not Start PrEP Without Medical Evaluation?

PrEP should not be treated like an ordinary over-the-counter supplement. Medical evaluation is important. In particular, someone with a possible recent HIV exposure, symptoms suggestive of acute HIV infection, or an uncertain HIV test result may need additional testing before PrEP is started or continued. CDC guidance emphasizes confirming HIV-negative status before prescribing PrEP because undiagnosed HIV infection can complicate prevention medication and increase the risk of resistance. People with significant kidney disease may also require special consideration when choosing an oral PrEP regimen. Certain medicines may not be appropriate for everyone. Pregnancy, breastfeeding, hepatitis B infection, kidney function, other medications, allergies, and medical conditions can all affect the choice of prevention strategy.

Types of PrEP

PrEP is not one single medication. There are several prevention approaches, and availability differs between countries and healthcare systems. Broadly, PrEP can include:

1. Oral PrEP
2. Long-acting injectable PrEP
3. Other approved PrEP technologies in certain settings

WHO’s current PrEP implementation guidance covers oral PrEP, the dapivirine vaginal ring, and injectable cabotegravir, while WHO’s 2025 guidance recommends twice-yearly injectable lenacapavir as an additional HIV prevention choice. The specific option available to an individual should be determined with a qualified healthcare professional.

Oral PrEP

Oral PrEP involves taking an HIV-prevention medication by mouth according to a prescribed schedule. One commonly used oral PrEP combination is: Tenofovir + emtricitabine Different formulations and approvals exist in different countries. The exact medicine prescribed depends on:

• Local approval
• HIV exposure route
• Kidney function
• Hepatitis B status
• Age
• Sex and gender considerations
• Other medical factors
• Medication availability
• Clinical guidelines

Never assume that one PrEP pill is interchangeable with another.

Daily Oral PrEP

Daily oral PrEP means taking the prescribed medication consistently each day. This approach is commonly used because it provides continuous preventive coverage when taken correctly. The major challenge is adherence. Missing occasional doses can reduce the level of medication available for protection. A person starting PrEP should receive individualized guidance about when protection becomes effective for the specific medication and exposure route. There is no universal “one day equals full protection” rule that should be applied to every person or every PrEP regimen.

Why Consistency Matters

PrEP medication needs to be present at effective levels to provide its intended preventive effect. Missing doses can reduce protection. Common reasons people miss medication include:

• Forgetting
• Travel
• Changing routines
• Work schedules
• Sleeping away from home
• Running out of medication
• Side effects
• Stigma
• Fear that others may see the medication
• Cost or access problems
• Not understanding the dosing schedule

Creating a practical routine can help. Some people associate medication with an existing daily habit such as:

• Brushing teeth
• Breakfast
• Evening skincare
• Preparing for bed
• Taking another prescribed medication

A healthcare professional can also discuss adherence strategies.

Injectable PrEP

Long-acting injectable PrEP is another prevention option. One important injectable PrEP medicine is cabotegravir, commonly referred to as CAB-LA. CDC guidance describes cabotegravir as an injectable PrEP option administered initially, again one month later, and then every two months thereafter. The exact availability and regulatory status of injectable PrEP varies by country. Injectable PrEP may be attractive to people who:

• Prefer injections over daily pills
• Have difficulty maintaining daily medication adherence
• Want a longer-acting prevention option
• Have medical circumstances that make certain oral options less suitable

However, injectable PrEP requires keeping scheduled healthcare appointments. Missing injection appointments can reduce protection.

Newer Long-Acting PrEP Options

HIV prevention continues to evolve. In July 2025, WHO recommended twice-yearly injectable lenacapavir as an additional PrEP option. WHO described it as a long-acting prevention choice that can help address barriers associated with daily pills and frequent healthcare visits. This does not mean that every person in every country can currently access lenacapavir for PrEP. Regulatory approvals, local programs, healthcare availability, pricing, and implementation can differ substantially. Therefore, people should ask a qualified healthcare professional which PrEP options are actually approved and available in their location.

PrEP and HIV Testing

HIV testing is one of the most important parts of PrEP care. Before starting PrEP, healthcare professionals need to establish that the person does not have HIV. Testing may involve:

• HIV antigen/antibody testing
• Laboratory-based testing
• HIV-1 RNA testing in specific circumstances
• Additional testing when results are unclear or recent infection is suspected

The testing strategy can become more complicated if someone recently used PrEP or PEP, or recently received an injectable PrEP medicine. CDC guidance specifically recommends more careful HIV assessment when recent antiretroviral prevention medication could affect testing or when symptoms suggest acute HIV infection.

Why HIV Testing Before PrEP Matters

Suppose a person has recently acquired HIV but does not yet know it. If they begin a preventive medication without properly identifying the infection, the medication may not constitute an appropriate complete HIV treatment regimen. This is one reason PrEP programs emphasize HIV testing. Testing is therefore not simply administrative paperwork. It is part of safe PrEP prescribing.

What If Someone Has Symptoms of Acute HIV Infection?

Some people experience a flu-like illness during early HIV infection. Possible symptoms can include:

• Fever
• Fatigue
• Sore throat
• Rash
• Swollen lymph nodes
• Muscle aches
• Headache
• Night sweats

However, these symptoms are not specific to HIV. Many common illnesses can cause similar symptoms. A person should not diagnose HIV based on symptoms alone. If someone recently experienced a possible HIV exposure and develops symptoms that could represent acute HIV infection, they should seek medical advice and discuss appropriate HIV testing. CDC guidance recommends additional evaluation when acute HIV infection is suspected.

How Often Is HIV Testing Needed During PrEP?

Testing frequency depends on the PrEP method. For people taking oral PrEP, CDC guidance recommends ongoing HIV testing at least every three months, alongside assessment for acute HIV symptoms and other prevention needs. Injectable PrEP requires HIV testing at specified follow-up visits associated with the injection schedule. The exact follow-up schedule should come from the prescribing clinician and the applicable local guideline. Do not assume that an HIV test once a year is sufficient simply because you feel well. Regular monitoring is part of responsible PrEP use.

PrEP and STI Testing

PrEP prevents HIV. It does not prevent all sexually transmitted infections. Therefore, STI screening remains important. Depending on circumstances, testing may include:

• Chlamydia
• Gonorrhea
• Syphilis
• HIV
• Hepatitis B
• Hepatitis C
• Other infections when clinically indicated

The location of exposure can also matter. For example, a person may require:

• Urine testing
• Genital testing
• Throat testing
• Rectal testing
• Blood testing

Not every infection can be identified through one universal test. CDC PrEP guidance recommends STI assessment and screening as part of ongoing PrEP care.

PrEP Does Not Prevent Every STI

This is one of the most important things to remember. PrEP is an HIV prevention tool. It does not make someone immune to:

• Gonorrhea
• Chlamydia
• Syphilis
• Herpes
• HPV
• Trichomoniasis
• Hepatitis B
• Other infections

Condoms can provide protection against many infections when used correctly, although they do not eliminate every possible route of transmission. Regular testing is also valuable because many STIs can cause no symptoms.

PrEP and Condoms

PrEP and condoms are not competitors. They can be used together. For someone concerned about HIV and other STIs, combining prevention strategies may provide broader protection.

PrEP can help prevent:

HIV

Condoms can help reduce the risk of:

HIV and several other STIs, while also helping prevent pregnancy when used correctly. Using PrEP does not mean someone should stop using condoms automatically. The appropriate prevention combination depends on the individual’s circumstances and preferences.

PrEP and Pregnancy

Pregnancy can affect decisions around medication and healthcare. Someone who is pregnant, planning pregnancy, trying to conceive, or breastfeeding should discuss PrEP with a healthcare professional rather than making medication decisions independently. HIV prevention during pregnancy can be particularly important because HIV can also be transmitted from a mother to a baby. A healthcare professional can discuss:

• HIV testing
• PrEP options
• Pregnancy safety considerations
• Other prevention strategies
• STI testing
• Partner HIV status
• Ongoing monitoring

Do not stop or start PrEP during pregnancy without medical advice.

PrEP and Hepatitis B

Hepatitis B requires special consideration with some oral PrEP medicines. Tenofovir and emtricitabine can also have activity against hepatitis B. This means people with active hepatitis B should not simply stop certain oral PrEP medicines without medical guidance. Stopping medication can allow hepatitis B activity to rebound and potentially cause liver problems. CDC guidance recommends hepatitis B screening for people considered for oral PrEP and emphasizes appropriate follow-up when active hepatitis B is present. If you have hepatitis B, tell your healthcare professional before starting or stopping oral PrEP.

PrEP and Kidney Health

Kidney function is an important consideration for some oral PrEP regimens. Tenofovir-containing PrEP can cause changes in kidney function in some people. CDC guidance recommends assessing kidney function before starting oral PrEP and monitoring it periodically. Injectable cabotegravir does not require the same kidney assessment. People with:

• Kidney disease
• High blood pressure
• Diabetes
• Certain other medical conditions
• Other medications that may affect kidney function

may require additional consideration. Never assume that a medication is safe for you simply because it is safe for another person.

PrEP and Other Medicines

Tell your healthcare professional about all medications you use. This includes:

• Prescription medicines
• Over-the-counter medicines
• Supplements
• Herbal products
• Recreational substances
• Other HIV medicines
• Medicines for kidney or liver conditions

Medication interactions depend on the specific PrEP product. Your healthcare professional or pharmacist can check for clinically important interactions.

What Are the Side Effects of PrEP?

Many people tolerate PrEP well. However, side effects can occur. Possible effects vary by medication. Some people taking oral PrEP may experience:

• Nausea
• Headache
• Stomach discomfort
• Fatigue
• Diarrhea

These symptoms may be temporary. More significant or persistent symptoms should be discussed with a healthcare professional. Different PrEP products have different safety profiles, so it is important not to assume that side effects from one medication apply identically to another.

What If PrEP Causes Side Effects?

Do not automatically stop medication because of a mild side effect. Instead:

1. Note what symptoms occurred.
2. Record when they started.
3. Consider whether anything else changed.
4. Contact the prescribing healthcare professional.
5. Ask whether the symptom is expected.
6. Ask whether testing is needed.
7. Ask whether the medication should be continued, changed, or stopped.

If you experience a severe or potentially dangerous reaction, seek urgent medical care.

Does PrEP Have Long-Term Risks?

Every medication has potential benefits and risks. For oral PrEP, healthcare professionals consider factors such as:

• Kidney function
• Bone health in certain populations
• Hepatitis B
• Lipid changes for some formulations
• Other medications
• Individual medical history

For injectable PrEP, clinicians consider:

• Injection-site reactions
• Medication allergies
• Appointment adherence
• HIV testing
• The implications of delayed or missed injections
• The period after discontinuation when medication levels gradually decline

CDC guidance provides specific monitoring recommendations for oral and injectable PrEP. The appropriate medication is therefore an individualized clinical decision.

PrEP and Injection-Site Reactions

People receiving injectable cabotegravir may experience reactions at the injection site. Possible symptoms include:

• Pain
• Tenderness
• Swelling
• Redness
• A small lump
• Discomfort

These reactions can vary from person to person. If symptoms are severe, persistent, worsening, or accompanied by other concerning symptoms, medical advice should be obtained.

What Happens If You Miss an Oral PrEP Dose?

A missed dose does not mean you should automatically double the next dose. Do not improvise the dosing schedule. The correct response depends on:

• Which medication you use
• How many doses were missed
• When the last dose was taken
• When possible exposure occurred
• Whether you are using a daily or event-driven regimen
• Your exposure route

If you miss a dose, consult the prescribing healthcare professional or pharmacist for instructions specific to your medication.

What Is 2-1-1 PrEP?

You may encounter the term 2-1-1 PrEP online. It refers to an event-driven dosing strategy involving specific doses around anticipated sexual exposure. This is not a universally appropriate PrEP schedule. CDC guidance states that 2-1-1 dosing is not FDA-approved and is not recommended by CDC. It has been studied specifically in adult gay and bisexual men using F/TDF and is not intended as a general dosing strategy for everyone. It should not be copied from an internet post or another person’s medication routine. If you are interested in non-daily PrEP, discuss the available options with a clinician familiar with current HIV-prevention guidance.

PrEP and Anal, Vaginal or Other Exposure Routes

The effectiveness and recommended use of PrEP can depend on the route of HIV exposure and the medication being used. People should not assume that a dosing strategy studied for one population or exposure route automatically applies to everyone. Healthcare professionals consider:

• Type of exposure
• Frequency of exposure
• Medication
• Dosing schedule
• Adherence
• Medical history
• Other prevention methods

This is particularly important when considering non-daily approaches.

How Quickly Does PrEP Start Working?

The answer is not identical for every PrEP product and every exposure route. Protection develops as medication reaches effective levels in relevant tissues. Because different drugs, dosing methods, and exposure routes have different pharmacological characteristics, you should follow the specific guidance provided for your prescribed PrEP method. Do not assume:

“I took one pill, so I am fully protected.”

Starting PrEP is a process rather than an instant guarantee. Ask your healthcare professional when your particular PrEP method is expected to provide meaningful protection for the type of exposure relevant to you.

What Happens When You Stop Oral PrEP?

Protection does not disappear immediately in one moment. After stopping daily oral PrEP, medication levels gradually decline. CDC guidance states that protection from HIV can wane over approximately 7–10 days after stopping daily oral PrEP. However, the correct stopping plan depends on the medication and exposure circumstances. If you continue to have potential HIV exposure after stopping PrEP, discuss alternative prevention options with a healthcare professional.

What Happens After Stopping Injectable PrEP?

Long-acting injectable medication behaves differently. After an injection is discontinued, medication can remain in the body for an extended period while gradually declining. This period is sometimes referred to as the tail period. The problem is that medication levels can eventually fall below protective levels while remaining detectable. This creates an important clinical consideration because inadequate antiretroviral drug levels during ongoing HIV exposure may contribute to drug resistance if HIV is acquired. CDC guidance recommends discussing another effective prevention strategy after discontinuing injectable cabotegravir when ongoing HIV exposure is possible. Do not simply stop scheduled injections without discussing the transition plan with your healthcare professional.

PrEP vs PEP

PrEP and PEP are both HIV prevention strategies, but they are used at different times.

Feature	PrEP	PEP
Meaning	Pre-exposure prophylaxis	Post-exposure prophylaxis
Timing	Before potential exposure	After potential exposure
Purpose	Reduce risk before exposure	Reduce risk after a possible exposure
Typical use	Ongoing prevention	Emergency prevention
Requires medical guidance	Yes	Yes
HIV testing	Important	Important
Intended for people with HIV	No	No
Requires prompt action	For safe initiation and protection	Yes, because timing matters

If a possible HIV exposure has already occurred and you are not taking PrEP appropriately, do not assume that starting PrEP afterward is the same thing as taking PEP. Seek urgent medical advice.

What Is PEP?

PEP stands for post-exposure prophylaxis. It involves antiretroviral medication taken after a potential HIV exposure to reduce the chance of infection. PEP is time-sensitive. If you think you may have been exposed to HIV recently, seek medical care immediately rather than waiting for symptoms. A healthcare professional can determine whether PEP is appropriate.

Can You Take PrEP and PEP?

These are different prevention strategies and should not be combined or switched between casually. If you are already taking PrEP and experience a potential exposure, the appropriate response depends on:

• Your adherence
• Your medication
• The type of exposure
• Timing
• HIV status of the source, if known
• Any recent missed doses
• Your clinical history

Speak to a healthcare professional promptly.

PrEP and U=U

U=U means Undetectable = Untransmittable. People living with HIV who are on effective treatment and maintain an undetectable viral load do not sexually transmit HIV. This is supported by scientific evidence and is an important part of modern HIV prevention. PrEP and U=U are different strategies.

U=U

A person living with HIV takes effective treatment and maintains an undetectable viral load.

PrEP

A person without HIV uses prevention medication to reduce their chance of acquiring HIV. Understanding both concepts can reduce unnecessary fear and HIV-related stigma. CDC guidance recognizes the prevention benefit of sustained viral suppression.

PrEP Does Not Mean Someone Has HIV

This is a common misconception. Taking PrEP does not mean that someone has HIV. PrEP is specifically intended for people who do not have HIV. A person might take PrEP simply because they want an additional prevention strategy. Medication use should not be treated as proof of someone’s HIV status.

PrEP Does Not Mean Someone Has Multiple Partners

Another common misconception is that PrEP indicates a person’s relationship or sexual behavior. It does not. People may choose PrEP for many reasons. Someone may be in:

• A long-term relationship
• A new relationship
• A relationship with different HIV statuses
• A non-monogamous relationship
• A situation where partner status is uncertain
• A circumstance where additional HIV protection provides reassurance

PrEP decisions are personal and medical. They should not be used to judge someone.

PrEP and Privacy

Healthcare privacy matters. Some people may worry about:

• Family members seeing medication
• Partners asking questions
• Workplace stigma
• Social stigma
• HIV-related misconceptions
• Fear of being judged

If privacy is important to you, ask your healthcare provider about:

• Confidential consultation
• Test-result privacy
• Prescription records
• Medication packaging
• Telehealth options where legally and clinically appropriate
• Safe communication preferences

Privacy policies vary between healthcare providers and jurisdictions.

PrEP in India

People in India who are considering PrEP should speak with a qualified healthcare professional or HIV/sexual-health service familiar with current Indian HIV-prevention guidance. Availability of specific PrEP medicines can vary. The medication or formulation available in one country may not be available, approved, or routinely provided in another. This is especially important with newer long-acting PrEP products. Do not purchase HIV-prevention medication from an unknown online seller simply because a website claims that it is “PrEP.” Medication authenticity, storage, prescription requirements, clinical monitoring, and appropriate testing all matter.

Finding PrEP Care in Gurgaon or Gurugram

If you are looking for PrEP-related care in Gurgaon/Gurugram, consider a legitimate:

• HIV clinic
• Infectious-disease specialist
• Sexual-health clinic
• Government health facility
• Hospital
• Qualified physician
• Reputable laboratory linked with appropriate medical care

When contacting a provider, you can simply ask:

“Do you provide HIV PrEP consultation and testing?”

You do not need to disclose personal details to reception beyond what is necessary to arrange an appointment. A qualified healthcare professional can then discuss your circumstances privately.

What Happens During a PrEP Consultation?

A PrEP consultation may include questions about:

• HIV prevention
• Recent HIV testing
• Possible HIV exposures
• Current medications
• Medical history
• Kidney health
• Hepatitis B
• STI history
• Pregnancy or pregnancy plans where relevant
• Preferred prevention method
• Ability to follow medication or injection schedules

These questions are intended to help determine the safest prevention strategy. You should be able to ask questions too.

What Tests May Be Needed Before Oral PrEP?

Depending on the medication and local clinical protocol, baseline evaluation may include:

HIV testing

To confirm that the person does not have HIV.

Kidney function

Important for certain oral tenofovir-containing PrEP options.

Hepatitis B testing

Important because some PrEP medicines are also active against hepatitis B.

STI screening

Depending on circumstances, testing can include:

• Syphilis
• Gonorrhea
• Chlamydia
• Other tests when clinically indicated

Additional tests

Depending on the medicine and individual’s circumstances, clinicians may consider additional assessments. CDC guidance specifically recommends baseline HIV assessment, STI screening, and kidney evaluation for appropriate oral PrEP candidates, with additional monitoring depending on the medication.

What Tests May Be Needed for Injectable PrEP?

Injectable PrEP also requires HIV testing before initiation. STI screening may be recommended. Kidney assessment is not required for cabotegravir in the same way it is for oral tenofovir-containing PrEP. Follow-up HIV testing is an important part of injectable PrEP care. CDC guidance recommends HIV testing at the injection-related follow-up visits and continued monitoring throughout treatment.

How Often Should Kidney Function Be Checked?

The monitoring schedule depends on the medication and individual health factors. For oral PrEP, CDC guidance recommends ongoing kidney monitoring, with more frequent assessment for people with certain risk factors or reduced kidney function. Examples of factors that may affect kidney monitoring include:

• Older age
• Lower kidney function at baseline
• Hypertension
• Diabetes
• Other kidney risks
• Other medications affecting kidney health

Your healthcare professional may recommend a schedule different from someone else’s.

Can You Drink Alcohol While Taking PrEP?

Alcohol does not automatically mean PrEP will stop working. However, heavy alcohol use can indirectly affect HIV prevention by making it harder to:

• Remember doses
• Attend appointments
• Use condoms
• Make informed decisions
• Seek care promptly after exposure

If alcohol or other substances make medication adherence difficult, discuss practical strategies with a healthcare professional.

What About Recreational Drug Use?

Some people may use recreational substances in social or sexual settings. Healthcare professionals should be able to discuss HIV prevention without judgment. Substance use may affect:

• Medication adherence
• Sexual decision-making
• Appointment attendance
• Risk of exposure
• Ability to seek care

If injection drug use is involved, HIV prevention also includes access to sterile injecting equipment and appropriate healthcare services. CDC guidance incorporates sterile needle/syringe access and substance-use treatment into comprehensive HIV prevention for people who inject drugs.

PrEP and Mental Well-Being

HIV-related anxiety can be stressful. Some people may repeatedly worry about exposure even when the actual risk is uncertain. PrEP can be one component of a structured prevention plan, but it should not become a substitute for appropriate medical evaluation. If you find yourself constantly testing, repeatedly searching for HIV symptoms, or experiencing severe anxiety after ordinary social contact, consider speaking with a healthcare professional. PrEP should be used as a planned prevention strategy rather than as a response to every moment of fear.

Common PrEP Myths

Myth 1: “PrEP is only for people with HIV.”

False. PrEP is intended for people who do not have HIV.

Myth 2: “PrEP cures HIV.”

False. PrEP is prevention. It is not a cure for HIV.

Myth 3: “PrEP prevents every STI.”

False. PrEP primarily targets HIV prevention. Other STI prevention requires additional strategies.

Myth 4: “Taking one PrEP pill immediately after exposure is the same as PEP.”

False. PrEP and PEP are different strategies. After a potential HIV exposure, urgent medical evaluation is appropriate.

Myth 5: “You don’t need HIV testing while on PrEP.”

False. Ongoing HIV testing is a fundamental component of PrEP care. CDC recommends regular HIV testing for people using PrEP.

Myth 6: “If PrEP is effective, condoms are unnecessary.”

Not necessarily. PrEP and condoms address different prevention needs. PrEP reduces HIV risk. Condoms can reduce the risk of HIV and multiple other STIs and can help prevent pregnancy.

Myth 7: “Anyone can copy a friend’s PrEP schedule.”

False. PrEP regimens vary by medication and circumstance. A healthcare professional should guide the regimen.

Myth 8: “PrEP means someone is promiscuous.”

False. PrEP is a medical prevention choice. It does not define someone’s character, relationship, or sexual behavior.

Common Mistakes People Make With PrEP

Several mistakes can reduce the effectiveness or safety of PrEP use.

Mistake 1: Starting without HIV testing

HIV status should be established before PrEP is started.

Mistake 2: Using someone else’s medication

Prescription medicines should not be shared.

Mistake 3: Assuming all PrEP medicines work the same way

They do not.

Mistake 4: Forgetting follow-up testing

PrEP requires ongoing monitoring.

Mistake 5: Ignoring kidney health

This is especially relevant for some oral PrEP regimens.

Mistake 6: Ignoring hepatitis B

People with active hepatitis B need appropriate medical guidance when starting or stopping certain oral PrEP medicines.

Mistake 7: Treating PrEP as STI protection

PrEP does not prevent every STI.

Mistake 8: Missing injection appointments

Long-acting injectable PrEP depends on maintaining the recommended schedule.

Mistake 9: Stopping suddenly without a plan

Stopping PrEP while HIV exposure continues may leave a person without adequate protection.

Mistake 10: Buying medication from unreliable sources

Counterfeit or incorrectly stored medicines can be dangerous and may not provide appropriate protection.

PrEP Safety Checklist

Before starting PrEP, discuss:

• HIV testing
• Recent HIV exposures
• Possible acute HIV symptoms
• Current medications
• Kidney health
• Hepatitis B status
• STI screening
• Pregnancy considerations where relevant
• Preferred PrEP method
• Medication adherence
• Injection appointment schedule if applicable
• What to do after a missed dose
• What to do after a possible HIV exposure
• How to stop PrEP safely
• Alternative prevention options
• Follow-up testing schedule

Questions to Ask Your Doctor About PrEP

If you are considering PrEP, you can take a list of questions to your appointment.

About eligibility

• Is PrEP appropriate for me?
• Which PrEP options are available here?
• Which option fits my circumstances?

About testing

• What HIV test do I need before starting?
• Do I need an STI screen?
• Should I check kidney function?
• Should I be tested for hepatitis B?

About medication

• How often do I need to take it?
• What happens if I miss a dose?
• What side effects should I watch for?
• Does it interact with my other medicines?

About stopping

• How should I stop PrEP?
• What happens if I stop unexpectedly?
• What should I do if I continue to have HIV exposure?

About emergencies

• What should I do if I think I was exposed to HIV?
• Would I need PEP?
• Where can I get urgent HIV prevention care?

PrEP and Regular Health Checkups

PrEP can be incorporated into broader sexual healthcare. A comprehensive prevention plan may include:

• HIV testing
• STI testing
• Vaccination
• Condom use
• PrEP
• PEP when appropriate
• Partner communication
• Pregnancy prevention where relevant
• Hepatitis prevention
• General medical care

Vaccination may be relevant for infections such as hepatitis B and HPV, depending on age, medical history, vaccination history, and local recommendations. Ask your healthcare professional which vaccines are appropriate for you.

PrEP and HPV

HPV is a common sexually transmitted infection. PrEP does not prevent HPV. HPV vaccination can reduce the risk from certain HPV types. People should discuss HPV vaccination with a qualified healthcare provider to determine whether vaccination is appropriate. Condoms may reduce HPV transmission risk but cannot provide complete protection because HPV can infect areas not covered by a condom.

PrEP and Herpes

PrEP does not prevent herpes. Herpes can be transmitted through skin-to-skin contact and may sometimes be transmitted when no visible symptoms are present. People concerned about herpes should discuss testing and prevention with a healthcare professional. Condoms can reduce—but do not completely eliminate—herpes transmission risk.

PrEP and Syphilis

PrEP does not prevent syphilis. Syphilis is treatable, but early diagnosis is important. Symptoms can vary significantly and may disappear temporarily even when infection remains. Regular STI screening is therefore important for people with ongoing exposure risk. CDC PrEP guidance includes syphilis screening as part of ongoing STI care.

PrEP and Gonorrhea or Chlamydia

PrEP does not prevent gonorrhea or chlamydia. These infections can occur without noticeable symptoms. Depending on sexual exposure, testing may involve different body sites. A healthcare professional may recommend:

• Urine testing
• Genital testing
• Throat testing
• Rectal testing

The correct test depends on the exposure.

What If Your Partner Has HIV?

A partner living with HIV does not automatically mean you will acquire HIV. Effective HIV treatment can reduce the viral load to undetectable levels. When a person living with HIV maintains an undetectable viral load, they do not sexually transmit HIV — U=U. If viral suppression is unknown, inconsistent, or not maintained, PrEP may be an additional prevention option for the HIV-negative partner. CDC guidance notes that PrEP may be considered in mixed-HIV-status relationships based on viral suppression, other partners, and the HIV-negative partner’s preference for additional prevention.

What If You Don’t Know Your Partner’s HIV Status?

You cannot determine someone’s HIV status based on appearance. Someone can have HIV without symptoms. A person’s previous test also does not necessarily represent their current status. If you have ongoing circumstances that could expose you to HIV, discuss prevention options with a healthcare professional. PrEP is one possible strategy. Regular HIV testing remains important.

Can PrEP Be Used Long Term?

For some people, PrEP may be used for an extended period. Long-term use requires ongoing medical monitoring. The appropriate duration depends on:

• Continuing HIV exposure
• Medication choice
• Health status
• Kidney function where relevant
• STI history
• Personal preference
• Changes in relationship circumstances
• Availability of other prevention methods

People can discuss continuing, changing, or stopping PrEP during follow-up visits.

Can You Restart PrEP After Stopping?

PrEP can potentially be restarted, but the correct process depends on:

• How long you stopped
• Which PrEP product you previously used
• Whether HIV exposure occurred during the gap
• Current HIV test results
• Recent PEP or PrEP use
• Medical circumstances

Do not assume that restarting medication without testing is safe. If there was possible HIV exposure during the period without PrEP, tell your healthcare professional.

What If You Miss an Injectable PrEP Appointment?

This is important. Long-acting injectable PrEP relies on maintaining medication levels over time. If an injection is late, the appropriate response depends on:

• How late the injection is
• Which injectable product you are using
• Your previous injection date
• Whether you had potential HIV exposure
• Local clinical guidance

Contact your healthcare provider as soon as possible. Do not simply wait until the next routine appointment without asking for instructions.

Why Appointment Adherence Matters With Injectable PrEP

One advantage of injectable PrEP is reduced daily pill burden. But the trade-off is appointment adherence. Someone who regularly misses scheduled injections may not receive the intended level of HIV prevention. Therefore, the “best” prevention method is not simply the one that sounds easiest. It should be a method that is medically appropriate and realistically manageable for the individual.

PrEP for People Who Travel

Travel can disrupt medication routines. If you take oral PrEP, plan ahead for:

• Enough medication
• Prescriptions
• Storage
• Time-zone changes
• Airport security rules
• Follow-up testing
• Access to healthcare at your destination

If you use injectable PrEP, plan appointments around travel. Never intentionally interrupt a prescribed regimen simply because you are travelling without first discussing the plan with your healthcare provider.

PrEP and Hotel or Travel Situations

Being away from home does not automatically increase HIV risk. However, travel may change routines. People may:

• Miss medication
• Drink more alcohol
• Meet new partners
• Forget condoms
• Lose medication
• Have difficulty accessing healthcare

Having a prevention plan before travelling can reduce avoidable problems.

What If a Condom Breaks While You Are Taking PrEP?

First, do not panic. If you are taking PrEP correctly, it is already part of your HIV prevention strategy. However, the appropriate response depends on:

• Whether you have been taking PrEP correctly
• Which PrEP regimen you use
• When the break occurred
• Whether HIV exposure was possible
• Whether other STI exposure occurred
• Whether pregnancy is possible

Continue following your prescribed PrEP regimen and contact a healthcare professional if you are uncertain about your protection. You may also need STI testing or pregnancy-related care depending on the situation.

What If You Were Not Taking PrEP When Exposure Happened?

If a possible HIV exposure has already occurred and you were not adequately protected by PrEP, seek medical care urgently. You may need an assessment for PEP. Do not wait for symptoms. Do not wait several days to see what happens. HIV prevention after exposure is time-sensitive.

PrEP and Emergency Contraception

PrEP does not prevent pregnancy. If a condom breaks or contraception fails and pregnancy is possible, emergency contraception may be an option depending on timing and individual circumstances. A healthcare professional or pharmacist can provide appropriate guidance. HIV prevention and pregnancy prevention are separate issues and may require separate interventions.

PrEP Does Not Replace Consent

HIV prevention and consent are separate concepts. Taking PrEP does not mean consent to sexual activity. Using condoms does not mean consent to sexual activity. Being in a relationship does not automatically establish consent. Every person has the right to communicate:

• Yes
• No
• Not now
• Stop
• Change of mind
• Different boundaries

Healthy sexual decision-making combines disease prevention with clear, voluntary consent.

PrEP and Personal Safety

Sexual health is broader than HIV prevention. People should also consider:

• Personal boundaries
• Privacy
• Safe transportation
• Trusted contacts
• Emergency planning
• Avoiding coercive situations
• Access to medical care
• Protection from violence or exploitation

PrEP is a medical tool. It is not a substitute for personal safety planning.

How to Remember Daily PrEP

If your clinician has prescribed daily oral PrEP, practical reminders may help. Possible strategies include:

Phone reminder

Set a recurring reminder.

Medication organizer

Use an appropriate organizer if it helps.

Existing routine

Link the medication to a daily habit.

Travel backup

Plan medication before leaving home.

Refill reminder

Arrange refills before your supply runs out.

Follow-up calendar

Record HIV tests and appointments. The goal is not perfection through complicated systems. The goal is creating a routine that is sustainable.

What If You Forget Your Medication Frequently?

Frequent missed doses may mean that the current prevention strategy is difficult to maintain. Instead of simply blaming yourself, discuss the problem with your healthcare provider. Possible alternatives may include:

• Adherence support
• A different medication
• A different dosing strategy where clinically appropriate
• Injectable PrEP
• Additional prevention strategies

CDC guidance recognizes injectable cabotegravir as an option that may be particularly useful for people who have difficulty taking oral PrEP consistently.

Can PrEP Fail?

No HIV prevention strategy should be described as an absolute guarantee. PrEP is highly effective when used appropriately, but protection depends on the specific method, adherence, timing, and circumstances. For example:

• Missing medication can reduce protection.
• Incorrect dosing can reduce protection.
• Delayed injections can reduce protection.
• Acute HIV infection at the time of initiation requires careful assessment.
• Stopping injectable PrEP without transition planning can create a period of reduced protection.

CDC reports that injectable cabotegravir is more than 99% effective at reducing sexual HIV acquisition when taken as prescribed. The safest approach is to follow the prescribed regimen and maintain required HIV testing.

PrEP and HIV Drug Resistance

Drug resistance is one reason HIV status needs to be assessed carefully before and during PrEP. If someone has HIV but receives an incomplete antiretroviral regimen intended for prevention, the virus may develop resistance to medications. This can complicate future HIV treatment. That is why healthcare professionals pay close attention to:

• HIV testing
• Recent exposures
• Acute HIV symptoms
• Ambiguous test results
• Medication history
• Previous PrEP
• Previous PEP
• Injectable PrEP history

CDC guidance includes additional HIV testing strategies when results are ambiguous or recent PrEP/PEP exposure could complicate interpretation.

What If an HIV Test Is Positive While Taking PrEP?

If testing suggests HIV infection while someone is using PrEP, further medical evaluation is necessary. Do not attempt to manage the situation independently. A healthcare professional may perform additional testing to confirm the diagnosis. If HIV is confirmed, the person should be connected promptly with appropriate HIV treatment and care. PrEP should not be treated as HIV treatment.

What If an HIV Test Is Unclear?

Sometimes an HIV test may be:

• Reactive
• Indeterminate
• Inconclusive
• Discordant

This does not necessarily mean that a person definitely has HIV. Additional testing may be required. CDC guidance describes confirmatory testing approaches involving laboratory HIV testing and HIV-1 RNA testing when necessary. Follow the healthcare provider’s instructions rather than trying to interpret a single result from an online search.

PrEP and Regular Medical Follow-Up

A good PrEP program is not simply: Get pills → take pills → never return. It involves ongoing care. Follow-up can include:

• HIV testing
• STI screening
• Medication review
• Side-effect assessment
• Kidney monitoring for relevant oral regimens
• Hepatitis considerations
• Adherence discussion
• Prevention planning
• Questions about stopping or continuing PrEP

The exact schedule depends on the medication and clinical circumstances.

What Should a PrEP Follow-Up Appointment Cover?

A useful appointment can address:

1. HIV status

Is testing negative and appropriately interpreted?

2. Adherence

Are doses being taken as prescribed?

3. Exposures

Has anything changed since the last visit?

4. STIs

Any symptoms or new exposure?

5. Medication safety

Any side effects or new medicines?

6. Kidney health

Required for certain oral PrEP users.

7. Prevention preferences

Does the current strategy still work?

8. Future plan

Continue, change, or stop?

A Simple PrEP Decision Framework

If you are wondering whether to investigate PrEP, consider these questions:

Question 1

Do I currently have HIV? If you do not know, HIV testing is the first step.

Question 2

Could I potentially be exposed to HIV? If yes, discuss prevention.

Question 3

Do I want an additional prevention method? If yes, PrEP may be worth discussing.

Question 4

Can I take daily medication reliably? If yes, oral PrEP may be an option depending on clinical factors.

Question 5

Would a long-acting method fit my lifestyle better? If available and medically appropriate, injectable PrEP may be worth discussing.

Question 6

Do I have kidney or liver conditions? Tell your clinician.

Question 7

Do I have hepatitis B? Tell your clinician before starting or stopping certain oral PrEP medicines.

Question 8

Have I had a recent possible HIV exposure? If yes, ask urgently about PEP rather than assuming PrEP is sufficient.

PrEP Checklist for Adults

Before starting: HIV

• Get appropriate HIV testing.
• Tell your provider about recent exposure.
• Report symptoms that could indicate acute HIV infection.

Medical history

• Discuss kidney health.
• Discuss hepatitis B.
• Discuss pregnancy where relevant.
• Provide a list of medications.

STIs

• Ask about STI screening.
• Mention symptoms or recent diagnoses.

Medication

• Understand exactly how your prescribed PrEP is taken.
• Know what to do if you miss a dose.
• Know where to obtain your next supply.

Follow-up

• Record HIV testing dates.
• Record STI testing dates.
• Keep appointments.
• Discuss side effects.

Emergency

• Know where to obtain PEP if a possible exposure occurs.

PrEP vs Condoms vs PEP

Prevention Method	When Used	Main Purpose
PrEP	Before potential HIV exposure	Reduce HIV acquisition risk
Condom	During sexual activity	Reduce HIV/STI risk and help prevent pregnancy
PEP	After possible HIV exposure	Reduce risk after exposure
HIV treatment	After HIV diagnosis	Treat and control HIV

These methods can complement one another. They are not interchangeable.

Frequently Asked Questions About PrEP

1. What does PrEP stand for?

PrEP means pre-exposure prophylaxis. It refers to antiretroviral medication used to help prevent HIV before potential exposure.

2. Is PrEP a vaccine?

No. PrEP is medication-based HIV prevention.

3. Does PrEP prevent HIV?

PrEP significantly reduces the risk of acquiring HIV when used correctly and consistently according to the prescribed regimen.

4. Does PrEP cure HIV?

No. PrEP is for HIV prevention. It is not HIV treatment.

5. Do I need an HIV test before starting PrEP?

Yes, HIV testing is an important part of safe PrEP initiation.

6. Do I need HIV tests while taking PrEP?

Yes. Regular HIV testing is part of PrEP care. CDC guidance recommends at least three-monthly HIV testing for people taking oral PrEP, with specific schedules for injectable PrEP.

7. Does PrEP prevent gonorrhea?

No. PrEP prevents HIV, not gonorrhea.

8. Does PrEP prevent chlamydia?

No. Additional STI prevention and testing are necessary.

9. Does PrEP prevent syphilis?

No. Syphilis requires separate prevention and testing strategies.

10. Can I use condoms while taking PrEP?

Yes. PrEP and condoms can be used together.

11. Can I take PrEP if my partner has HIV?

Potentially, yes. The decision depends on factors including the partner’s viral suppression, your circumstances, and your preference.

12. What if my partner has an undetectable viral load?

A person with HIV who maintains an undetectable viral load does not sexually transmit HIV. This is known as U=U. You can still discuss PrEP with your healthcare provider if you want an additional prevention strategy.

13. Is PrEP safe?

PrEP is an established HIV-prevention strategy, but individual safety depends on the medication and the person’s health. Medical monitoring is important.

14. Does oral PrEP affect the kidneys?

Some oral PrEP medicines containing tenofovir can affect kidney function. This is why kidney assessment is recommended for relevant oral PrEP regimens.

15. Does injectable PrEP require kidney monitoring?

Cabotegravir injections do not require the same kidney assessments as tenofovir-based oral PrEP.

16. Can someone with hepatitis B take PrEP?

Potentially, yes, but hepatitis B requires special consideration with certain oral PrEP medicines. Do not stop these medicines without medical guidance.

17. Can I stop PrEP whenever I want?

Stopping should be planned with a healthcare professional, particularly if HIV exposure may continue. The approach also differs between oral and injectable PrEP.

18. What happens if I stop injectable PrEP?

Medication levels gradually decline, creating a period known as the pharmacologic “tail.” If HIV exposure continues, another prevention method may be needed.

19. What if I miss a PrEP pill?

Follow the instructions for your specific medication and contact your healthcare provider if you are uncertain. Do not automatically double doses unless specifically instructed.

20. What if I miss an injectable PrEP appointment?

Contact your healthcare provider promptly. The appropriate response depends on how late the injection is and which injectable medication you use.

21. Is 2-1-1 PrEP suitable for everyone?

No. CDC does not recommend 2-1-1 PrEP as a general regimen. Its studied use is limited to specific populations and circumstances.

22. Can I buy PrEP online?

Only obtain medication through legitimate healthcare and pharmacy channels. Avoid unknown sellers or products whose authenticity, storage, or ingredients cannot be verified.

23. Can PrEP cause side effects?

Yes. Side effects vary by medication. Talk to your healthcare professional if symptoms are persistent, severe, or concerning.

24. Does PrEP affect fertility?

Medication-specific questions about fertility should be discussed with a qualified healthcare professional because the answer can depend on the medication, sex, pregnancy plans, and individual circumstances.

25. Can I take PrEP during pregnancy?

Some PrEP options may be used during pregnancy when clinically appropriate. Pregnancy-related decisions should be made with a healthcare professional.

26. Can I take PrEP while breastfeeding?

This depends on the specific medication and individual circumstances. Discuss breastfeeding with your healthcare professional before starting or changing PrEP.

27. Does PrEP protect against pregnancy?

No. PrEP is an HIV-prevention strategy, not contraception.

28. Does PrEP protect against herpes?

No. Additional prevention strategies are needed.

29. Does PrEP protect against HPV?

No. HPV vaccination and other prevention strategies may be appropriate.

30. Does PrEP mean I don’t need STI testing?

No. Regular STI screening remains an important part of sexual healthcare.

31. Can PrEP be used long term?

It can be used long term for some people when clinically appropriate and monitored.

32. What if I think I was exposed to HIV yesterday?

Seek urgent medical care. You may need PEP, depending on the exposure and circumstances. Do not wait for symptoms.

33. Can PrEP prevent HIV after exposure?

PrEP is designed for prevention before exposure. After a possible exposure, PEP may be the appropriate emergency prevention strategy.

34. Is PrEP only for certain sexual orientations?

No. HIV prevention should be based on exposure risk, medical circumstances, and individual preference rather than assumptions about identity.

35. Does taking PrEP mean someone has HIV?

No. PrEP is intended for people who do not have HIV.

Final PrEP Safety Summary

PrEP is one of the important tools available for HIV prevention. The key principles are straightforward:

1. Know your HIV status

Testing is fundamental before and during PrEP.

2. Use the correct PrEP regimen

Do not copy another person’s dosing schedule.

3. Take oral PrEP as prescribed

Consistency matters.

4. Keep injectable appointments

Long-acting PrEP depends on maintaining the recommended schedule.

5. Continue STI prevention

PrEP does not prevent every STI.

6. Consider condoms

Condoms can provide protection against HIV, several STIs, and pregnancy.

7. Monitor your health

Kidney monitoring, hepatitis B assessment, STI screening, and other tests may be necessary depending on the medication.

8. Understand PEP

If a possible HIV exposure has already happened, seek urgent medical advice about PEP.

9. Plan before stopping PrEP

Stopping oral and injectable PrEP involves different considerations.

10. Ask questions

A qualified healthcare professional can help you select a prevention approach that fits your medical circumstances and lifestyle.

A Practical PrEP Plan

For someone considering PrEP, the process can be simplified into several stages.

Step 1: Learn

Understand what PrEP is and what it does.

Step 2: Test

Get appropriate HIV testing.

Step 3: Discuss

Talk to a qualified healthcare professional about your HIV exposure circumstances and medical history.

Step 4: Screen

Complete the recommended baseline assessments.

Step 5: Choose

Discuss the PrEP method that is appropriate and available to you.

Step 6: Start

Follow the prescribed regimen.

Step 7: Monitor

Attend HIV testing and other recommended follow-up.

Step 8: Protect

Continue condoms and other STI-prevention strategies when appropriate.

Step 9: Respond

If a potential HIV exposure occurs, seek prompt medical advice.

Step 10: Review

If your circumstances change, review whether you should continue, change, or stop PrEP.

Why Regular HIV Testing Still Matters When PrEP Is Working

A common misunderstanding is:

“If I’m taking PrEP, why do I need HIV tests?”

The answer is that HIV testing is an important safety component of PrEP. PrEP is designed for people who do not have HIV. Regular testing helps healthcare professionals:

• Confirm continued HIV-negative status
• Identify possible infection early
• Investigate unusual symptoms
• Manage uncertain results
• Avoid inappropriate continuation of prevention-only medication when HIV treatment is required

This is why PrEP should be considered a healthcare program, not simply a pill.

Building a Complete HIV Prevention Strategy

The strongest prevention plan is often broader than one medication. A comprehensive strategy can include: HIV testing

–

PrEP when appropriate

–

Condoms

–

STI screening

–

Vaccination

–

Partner communication

–

PEP when appropriate

–

Prompt medical care Different people may need different combinations. There is no single prevention strategy that fits every adult.

When to Seek Urgent Medical Help

Seek urgent medical advice if:

• You think you were recently exposed to HIV
• You may need PEP
• You have a serious reaction to medication
• You have severe symptoms
• Your HIV test is reactive or unclear
• You develop symptoms after a recent high-risk exposure
• You have stopped PrEP while exposure is continuing
• You missed an injectable PrEP appointment and had potential HIV exposure
• You are unsure whether your current medication is protecting you

Do not rely on internet symptom searches in an emergency.

Important Reminder About Online HIV Information

HIV prevention information changes as new evidence, medicines, approvals, and public-health recommendations develop. WHO updated its PrEP implementation guidance in 2024 and issued additional guidance on injectable lenacapavir in 2025. CDC also updated its PrEP clinical guidance in 2026. Because medication approvals and healthcare availability differ between countries, an online article should not be treated as a substitute for local clinical guidance. If you are in Gurgaon/Gurugram or elsewhere in India and are considering PrEP, speak with a qualified healthcare provider about currently approved and available options.

Frequently Used PrEP Terms

PrEP

Pre-exposure prophylaxis.

PEP

Post-exposure prophylaxis.

HIV

Human immunodeficiency virus.

STI

Sexually transmitted infection.

U=U

Undetectable = Untransmittable.

CAB-LA

Long-acting injectable cabotegravir.

F/TDF

Emtricitabine/tenofovir disoproxil fumarate.

F/TAF

Emtricitabine/tenofovir alafenamide.

Viral load

The amount of HIV present in a person’s blood.

Acute HIV infection

The early period after HIV infection, when the virus may be detectable before some standard tests become positive.

Adherence

Taking or receiving medication according to the prescribed schedule.

Related Sexual Health Resources

Readers interested in PrEP may also want to explore:

• Sexual Health Guide
• Common STIs
• STI Testing
• HIV Testing Guide
• PEP Guide
• Condom Use Guide
• Condom Safety
• STI Prevention
• Consent Guide
• Boundaries & Consent
• Personal Safety
• Emergency Safety
• Sexual Hygiene
• Personal Hygiene
• Hygiene Myths

These pages should work together as a broader sexual-health education section rather than as isolated articles.

Final Takeaway

PrEP is a medically established HIV-prevention strategy designed for people who do not have HIV but may have a possibility of HIV exposure. It can involve oral medication or long-acting prevention options, depending on the product, country, clinical guidance, and individual circumstances. The most important principles are: Test before starting. Use the prescribed regimen correctly. Keep required follow-up appointments. Continue appropriate STI prevention. Understand the difference between PrEP and PEP. Do not stop or restart medication without understanding the implications. Seek medical advice after a possible HIV exposure. Ask about kidney health and hepatitis B when relevant. Remember that PrEP prevents HIV, not every STI or pregnancy. Most importantly, PrEP should be part of an individualized HIV-prevention plan developed with a qualified healthcare professional.

Medical Disclaimer

This page provides general educational information about HIV PrEP and sexual health. It is not a diagnosis, prescription, or substitute for professional medical advice. Medication names, approved uses, dosing schedules, testing requirements, availability, and clinical recommendations can vary by country and may change as new evidence and products become available. Do not start, stop, switch, share, or change PrEP medication based solely on this article. If you believe you have recently been exposed to HIV, seek urgent medical care to determine whether PEP or another intervention is appropriate. For personal medical decisions, consult a qualified healthcare professional.