HIV PEP Singapore | Emergency Post-Exposure Prophylaxis Within 72 Hours
Medically reviewed by Dr. Bosty Chan – MBChB (UK), MRCS (Edinburgh), Cert. in Andrology (Men’s Health)
Key Information
HIV PEP (Post-Exposure Prophylaxis) is an emergency treatment taken within 72 hours after possible HIV exposure to reduce infection risk. In Singapore, PEP requires a doctor’s assessment and a 28-day medication course. Sire provides confidential online consultations with Singapore-licensed doctors for urgent HIV PEP assessment, prescription, and discreet access when clinically appropriate.
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What is HIV PEP (Post-Exposure Prophylaxis) in Singapore?
HIV Post Exposure Prophylaxis (PEP) is an emergency medical treatment used after a potential exposure to HIV. It involves a 28-day course of antiretroviral (ARV) medications designed to stop the virus from establishing infection in the body.
PEP is not a routine prevention method. Instead, it is used only in urgent, time-sensitive situations where there has been a meaningful risk of HIV exposure. The key principle of HIV PEP Singapore treatment is speed – the earlier it is started, the higher the effectiveness.
How HIV PEP Works
After HIV enters the body, it begins replicating rapidly within the first hours to days. PEP works by:
- Blocking viral replication before it becomes established
- Preventing HIV from integrating into the immune system
- Reducing the probability of long-term infection
When taken correctly and started early, HIV PEP significantly reduces the risk of infection. However, it must be taken consistently for the full 28-day course to be effective.
HIV PEP Singapore Access
In Singapore, HIV PEP is only available via doctor prescription. A medical assessment is required to determine:
- Whether the exposure is high-risk
- Whether PEP is clinically indicated
- Which medication regimen is appropriate
At Sire, patients can access confidential online consultations with Singapore-licensed doctors for urgent HIV PEP assessment. If suitable, treatment can be arranged promptly with discreet delivery or self-collection options.
Important Limitations of PEP
PEP is effective only when used correctly:
- It must be started within 72 hours
- It is most effective within 24 hours
- It does NOT guarantee 100% protection
- It is not a substitute for PrEP or condoms
PEP should always be followed by appropriate HIV testing as advised by your doctor.
How HIV PEP Works & What to Expect
HIV PEP treatment involves a 28-day daily course of antiretroviral medication prescribed after clinical evaluation.
Treatment process
- A doctor assesses exposure risk and timing
- Baseline testing may be recommended
- A PEP regimen is prescribed if clinically indicated
- Medication must be taken daily for 28 days
Strict adherence is essential. Missing doses may reduce effectiveness.
Is HIV PEP safe?
Modern HIV PEP medications are generally well tolerated. Some patients may experience:
- Mild nausea
- Headache
- Fatigue
- Temporary digestive discomfort
These side effects are usually short-lived and resolve after completion of treatment.
Doctor oversight is essential
At Sire, all HIV PEP prescriptions are managed by Singapore-licensed doctors trained in sexual health and infectious disease risk assessment. We prioritise urgent cases within the critical 72-hour window.
Dr. Bosty Chan – MBChB (UK), MRCS
(Edinburgh), Cert. in Andrology (Men’s Health)
When Should HIV PEP Be Started?
The timing of HIV PEP is the most important factor affecting effectiveness.
Recommended timing:
- Within 24 hours: highest effectiveness
- Within 72 hours: still effective
- After 72 hours: generally not recommended, case-by-case only
PEP becomes less effective as time passes because HIV replication may already have progressed beyond prevention.
What if I am unsure when exposure happened?
A doctor will evaluate:
- Timing of exposure
- Type of exposure
- Partner risk profile
- Clinical suitability for PEP
If PEP is not appropriate, alternative testing or prevention strategies may be recommended.
How to Get HIV PEP in Singapore with Sire
Accessing HIV PEP quickly is critical. Sire provides a streamlined telemedicine pathway for urgent assessment and treatment.
Step 1: Urgent online consultation
Book a same-day or urgent video consultation with a Singapore-licensed doctor. Your exposure risk will be assessed confidentially.
Step 2: Clinical evaluation & testing (if needed)
Your doctor may recommend:
- Baseline HIV testing
- STI screening
- Liver and kidney function tests
These ensure safe prescription of medication.
Step 3: Prescription & access
If HIV PEP is clinically indicated:
- Medication may be prescribed immediately
- Delivered discreetly or available for self-collection
All care is handled confidentially in accordance with Singapore medical regulations.
Dr. Bosty Chan – MBChB (UK), MRCS
(Edinburgh), Cert. in Andrology (Men’s Health)
HIV Testing, Safety Monitoring & Clinical Care
Before and after HIV PEP, testing plays a key role in ensuring accurate diagnosis and safety.
Baseline testing (before or immediately after starting PEP)
Doctors may recommend:
- HIV test
- Full blood count
- Liver function tests
- Kidney function tests
These help ensure medication safety and establish a baseline.
Follow-up testing schedule
- 2 weeks: safety blood tests if required
- 4 weeks: repeat blood + HIV testing
- 3 months: final confirmation HIV test
Follow-up testing is important because HIV has a window period where early infection may not be immediately detectable.
Why follow-up matters
Even when PEP is taken correctly, testing ensures:
- No missed early infection
- Confirmation of treatment effectiveness
- Peace of mind after exposure
Additional STI screening
Patients with potential HIV exposure may also be tested for:
- Chlamydia
- Gonorrhoea
- Syphilis
- Hepatitis B and C
Early detection allows timely treatment and prevents complications.
Why Choose Sire?
With 15 years of experience, we support your health goals with reliable care delivered by our Singapore-licensed doctors.
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Consult with our licensed doctors online and receive your treatment delivered discreetly to you, with same-day delivery available.
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Meet Our Doctor
Dr. Bosty Chan is a medical doctor with over 10 years of clinical experience in the United Kingdom and Singapore. He graduated from the University of Aberdeen, Scotland, and is a Member of the Royal College of Surgeons (Edinburgh). He has a clinical interest in telemedicine, digital health, and men’s health and holds a Certificate in Andrology (Singapore) from the Singapore Society of Men’s Health.
Dr Chan serves as the lead physician at Sire and Dame, discreet telemedicine platforms based in Singapore, where he focuses on accessible, technology-enabled healthcare.
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Dr Bosty Chan
Medical Director – Sire & Dame (Cloud Clinic)
MBChB (UK), MRCS (Edinburgh), Cert. in Andrology (Men’s Health)
Sire’s Easy Telemedicine Process
Discreet consults and doorstep delivery. We’ve made men’s healthcare as simple as it should be.
Survey
Complete a quick online health questionnaire and connect with our licensed Singapore doctor via a secure video consultation.
Consult
Our doctor reviews your health profile and, if appropriate, prescribes a clinically-proven treatment plan tailored to your needs.
Delivery & Follow-Up
Your medication is shipped in discreet packaging with same-day delivery or self-collection. Our care team is here to support you.
Common Questions About HIV PEP Singapore
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