Emergency Steps for PEP Treatment After Exposure in Singapore

A possible exposure to HIV can be stressful, especially when you are unsure what to do next. Whether a condom breaks during sex, you experience a needlestick injury, or another high-risk incident occurs, seeking medical attention promptly can help protect your health.

Post-exposure prophylaxis (PEP) is an emergency treatment that uses HIV medication to reduce the risk of infection after potential exposure. In Singapore, PEP must be started within 72 hours of exposure, and starting as soon as possible is strongly recommended.

This guide explains the immediate steps to take, where to seek PEP treatment in Singapore, and what to expect during follow-up care.

What Is PEP Treatment?

PEP, or post-exposure prophylaxis, is a short course of antiretroviral medication prescribed to people who may have recently been exposed to HIV.

The medication works by preventing HIV from establishing an infection in the body. PEP is intended for emergency situations and is not a substitute for ongoing HIV prevention methods.

A healthcare professional will assess your exposure, medical history, and HIV status to determine whether PEP is appropriate.

When Should You Seek Emergency PEP Treatment?

PEP may be recommended following certain exposures, including:

• Condom failure: A condom breaks or slips during vaginal or anal sex with a partner whose HIV status is positive or unknown.

• Needlestick injuries: You are accidentally punctured by a needle or sharp object potentially contaminated with HIV-infected blood.

• Sharing injection equipment: You share needles, syringes, or other equipment that may contain infected blood.

• Sexual assault: You experience sexual contact that may have exposed you to HIV.

Not every exposure requires PEP. A healthcare professional can assess the circumstances and determine whether treatment is necessary.

Emergency Steps to Take After Possible HIV Exposure

1. Seek Medical Attention Immediately

Do not wait for symptoms to appear or for your partner's HIV test results before seeking help. Visit a hospital emergency department or an appropriate healthcare provider as soon as possible.

In Singapore, the Communicable Diseases Agency advises people who require emergency PEP to visit the Emergency Department of a public hospital.

2. Clean the Exposed Area

If you experience a needlestick injury or blood exposure:

• Wash the affected skin with soap and running water.

• If blood or body fluids enter your eyes, rinse them gently with clean water.

• Avoid squeezing the wound aggressively or applying harsh chemicals.

Cleaning the area is a first-aid measure, not a replacement for medical assessment.

3. Explain the Exposure to the Doctor

Tell the healthcare professional:

• When the exposure occurred

• What type of exposure happened

• Whether blood or other potentially infectious fluids were involved

• Whether you know the other person's HIV status

• Whether you take any medications or have existing medical conditions

Providing accurate information helps the doctor assess your risk and choose an appropriate treatment plan.

4. Start PEP Within the 72-Hour Window

PEP is most effective when started as early as possible, ideally within the first 24 hours. It should not be delayed while waiting for test results if a clinician determines that treatment is indicated.

If more than 72 hours have passed, seek medical advice anyway. A healthcare professional can recommend appropriate HIV testing and follow-up care.

Where to Get PEP Treatment in Singapore

If you believe you have been exposed to HIV, seek urgent medical assessment rather than waiting for a routine appointment.

Possible options include:

• Public hospital Emergency Departments: Seek emergency PEP assessment and tell the staff that you may have had an HIV exposure within the past 72 hours.

• Tan Tock Seng Hospital (TTSH): The National Centre for Infectious Diseases (NCID) directs people requiring PEP to the TTSH Emergency Department.

• Private healthcare providers: Contact a provider that offers urgent HIV exposure assessment and PEP prescribing. Confirm availability before travelling if doing so will not delay treatment.

For emergencies, prioritise prompt medical assessment over comparing providers or prices.

What Happens During PEP Treatment?

Initial Medical Assessment

The doctor will review the exposure and may arrange baseline HIV testing, kidney and liver function tests, and screening for other sexually transmitted infections or hepatitis.

These tests help establish your health status and guide safe treatment. They should not unnecessarily delay the first dose when PEP is indicated.

Taking PEP Medication

PEP generally involves taking prescribed antiretroviral medication daily for 28 days.

Your doctor will select the medication regimen based on your circumstances, including other medications you take and any relevant medical conditions.

Managing Possible Side Effects

Some people experience mild side effects, such as:

• Nausea or stomach discomfort

• Headache

• Fatigue

• Diarrhoea

Contact your healthcare provider if side effects become difficult to manage. Do not stop or change your medication without medical advice.

HIV Testing and Follow-Up After PEP

Taking PEP does not eliminate the need for follow-up testing. Your healthcare provider will recommend an HIV testing schedule based on the exposure, the treatment course, and the tests used.

Follow-up may include:

• Baseline HIV testing before or around the time PEP begins

• Additional HIV testing after treatment

• Screening for other sexually transmitted infections when appropriate

• Review of medication adherence and side effects

A negative early HIV test does not necessarily rule out infection because HIV tests have different window periods.

PEP vs PrEP: Understanding the Difference

FeaturePEPPrEPPurposePrevent HIV after possible exposurePrevent HIV before potential exposureTimingStarted after exposureStarted before anticipated exposureUseEmergency treatmentOngoing prevention for people with continuing riskDurationUsually 28 daysDepends on the prescribed prevention plan

If you may experience repeated HIV exposures, ask your healthcare provider whether pre-exposure prophylaxis (PrEP) may be suitable after completing PEP.

Frequently Asked Questions

Can I Start PEP Treatment After 72 Hours?

PEP is generally not recommended after 72 hours because it is unlikely to be effective. However, you should still seek medical advice for HIV testing, risk assessment, and other prevention options.

Do I Need PEP If My Partner's HIV Status Is Unknown?

Possibly. The decision depends on the type of exposure and other risk factors. Seek urgent medical assessment rather than assuming that PEP is unnecessary.

Can I Stop Taking PEP If I Feel Healthy?

No. Complete the prescribed 28-day course unless your healthcare professional advises otherwise. Feeling well does not establish that HIV transmission has been prevented.

Does PEP Protect Against Other Sexually Transmitted Infections?

No. PEP is designed to prevent HIV and does not protect against infections such as syphilis, gonorrhoea, or chlamydia. Your doctor may recommend additional STI testing.

Is PEP Available in Singapore After Sexual Assault?

Yes. People who may have been exposed to HIV during sexual assault should seek emergency medical care immediately. A healthcare professional can assess the need for PEP and other support services.

Take Action Quickly to Protect Your Health

Possible HIV exposure requires prompt attention, but effective emergency prevention is available. If you think you may need PEP treatment in Singapore, seek medical care immediately and do not wait for symptoms or test results.

Starting treatment early, completing the prescribed course, and attending follow-up appointments are important steps in reducing the risk of HIV infection.