PrEP Singapore – Doctor-Led HIV Prevention Online
Medically reviewed by Dr. Bosty Chan – MBChB (UK), MRCS (Edinburgh), Cert. in Andrology (Men’s Health)
Last updated: Jul 23, 2026
Key Information
PrEP is a highly effective HIV prevention medication for HIV-negative individuals at risk of exposure. At Sire, Singapore-licensed doctors provide discreet online consultations, medically supervised PrEP prescriptions, and ongoing monitoring tailored to your lifestyle. Choose daily or on-demand (2-1-1) PrEP with confidential delivery, proper lab testing, and evidence-based care aligned with Singapore clinical guidelines.
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What is PrEP and How Does It Work?
PrEP, or Pre-Exposure Prophylaxis, is a preventive medication used by HIV-negative individuals to reduce the risk of acquiring HIV infection through sexual exposure or injection drug use. When taken correctly under medical supervision, PrEP reduces the risk of sexually acquired HIV by more than 99%, making it one of the most effective HIV prevention tools available today.
PrEP works by preventing HIV from replicating inside the body if exposure occurs. The medication builds protective levels in the bloodstream and tissues, helping stop the virus before infection can become established.
The most commonly prescribed PrEP medication contains two antiretroviral medicines:
- Tenofovir disoproxil fumarate (TDF)
- Emtrictiabine (FTC)
These active ingredients have been extensively studied worldwide and are recommended in major international HIV prevention guidelines.
PrEP is intended for individuals who are HIV-negative but may have an increased likelihood of HIV exposure. This includes men who have sex with me (MSM), individuals with HIV-positive partners, people with multiple sexual partners, and individuals who do not consistently use condoms.
Importantly, PrEP is not a vaccine and does not provide permanent protection. It only works while taken correctly and requires regular medical follow-up. Routine HIV testing, kidney monitoring, and STI screening remain important parts of safe PrEP care.
PrEP also does not protect against other sexually transmitted infections such as gonorrhoea, chlamydia, or syphilis. Depending on your risk profile, your doctor may still recommend condom use and regular sexual health screening.
At Sire, every PrEP consultation is conducted confidentially by Singapore-licensed doctors through a secure telemedicine process. Before starting treatment, your doctor will assess your suitability for PrEP, discuss your lifestyle and sexual health history, and arrange any required baseline testing.
Many patients today prefer telemedicine because it offers greater privacy, convenience, and faster access to care. With discreet consultations and delivery options available, PrEP can now be accessed safely without unnecessary clinic visits.
For individuals seeking proactive HIV prevention in Singapore, PrEP remains one of the safest, most researched, and most effective preventive healthcare options available today.
Daily vs On-Demand (2-1-1) PrEP
There are two medically recognised ways to take PrEP in Singapore: Daily PrEP and On-Demand PrEP, also known as the “2-1-1” regimen.
Daily PrEP
Daily PrEP involves taking one tablet every day to maintain continuous HIV protection. This option is commonly recommended for individuals with ongoing or regular exposure risk because it provides consistent protective drug levels without needing to plan around sexual activity.
Daily PrEP is currently the most widely studied regimen and may be suitable for:
- Men who have sex with men (MSM)
- Individuals with HIV-positive partners
- People with multiple sexual partners
- Individuals seeking continuous protection
Protection generally reaches optimal levels after:
- Around 7 days for anal sex
- Up to 21 days for vaginal exposure and injection-related risk
On-Demand PrEP (2-1-1)
On-demand PrEP is a flexible regimen taken around sexual activity rather than daily.
The dosing schedule involves:
- 2 tablets taken 2-24 hours before sex
- 1 tablet taken 24 hours later
- 1 final tablet taken another 24 hours later
This regimen may be appropriate for some individuals with less frequent sexual activity but requires careful timing and adherence. It should only be used under medical supervision after assessment by a licensed doctor.
Your Sire doctor will recommend the most appropriate regimen based on your lifestyle, risk profile, and clinical suitability.
Dr. Bosty Chan – MBChB (UK), MRCS
(Edinburgh), Cert. in Andrology (Men’s Health)
Free PrEP Starter Guide for Singapore Patients
Starting PrEP for the first time can feel overwhelming – especially when comparing daily vs on-demand dosing, understanding side effects, or learning what tests are required before treatment.
To help patients make informed decisions, Sire has created a free Singapore-focused PrEP guide reviewed by our medical team.
This downloadable guide explains:
- How PrEP works
- Daily vs 2-1-1 dosing
- Common side effects and safety monitoring
- HIV and STI testing requirements
- Missed dose guidance
- PrEP vs PEP
- Drug interactions and supplements
- What to expect during treatment
Designed specifically for patients in Singapore, this guide is based on current international HIV prevention recommendations and local clinical practices.
Whether you are considering PrEP for the first time or simply want clearer information before speaking with a doctor, this resource provides a practical introduction to safe and effective HIV prevention.
Is PrEP Legal and Available in Singapore?
Yes – PrEP is legal and available in Singapore, but it is prescription-only and should only be started under proper medical supervision.
PrEP medications containing tenofovir (TDF) and emtricitabine (FTC) are prescribed by licensed doctors after assessing suitability, HIV status, kidney health, and sexual health history.
Patients may encounter both branded and generic PrEP. In some cases, doctors may prescribe locally prepared formulations containing the same active ingredients where clinically appropriate and compliant with Singapore regulations.
Medical supervision is important because PrEP requires:
- Baseline HIV testing
- Kidney function monitoring
- Routine follow-up every few months
- STI screening where appropriate
Self-sourcing medications online or importing medications independently may carry risks involving authenticity, storage standards, continuity of care, and lack of proper monitoring.
At Sire, patients receive:
- Online consultations with Singapore-licensed doctors
- Confidential and discreet care
- Structured medical follow-up
- Guidance on safe and appropriate PrEP use
Our telemedicine process is designed to make HIV prevention simpler, faster, and more accessible while maintaining proper medical oversight and patient safety.
Dr. Bosty Chan – MBChB (UK), MRCS
(Edinburgh), Cert. in Andrology (Men’s Health)
Who Should Consider Taking PrEP?
PrEP may be suitable for HIV-negative individuals who have an increased likelihood of HIV exposure based on their lifestyle, relationship status, or sexual health history.
You may benefit from discussing PrEP with a doctor if you:
- Have a HIV-positive partner
- Have multiple sexual partners
- Do not consistently use condoms
- Have recently been diagnosed with STI
- Engage in higher-risk sexual activity
- Share injection equipment
- Want greater peace of mind and control over HIV prevention
PrEP is commonly used by men who have sex with men (MSM), but it is not limited to any single group. Many heterosexual individuals, serodiscordant couples, sex workers, and people with changing relationship dynamics may also benefit from PrEP after proper assessment.
One of the most important aspects of PrEP care is individualisation. Not everyone requires the same dosing approach, testing schedule, or follow-up plan. Factors such as kidney function, hep B status, medication interactions, and sexual activity patterns all influence whether PrEP is suitable and which regimen is most appropriate.
At Sire, consultations are conducted confidentially and without judgement. Our doctors focus on helping patients make informed decisions based on evidence-based HIV prevention strategies rather than fear or stigma.
Some patients seek PrEP because they are entering new relationships. Others prefer additional protection while travelling, during periods of increased sexual activity, or while waiting for a partner’s HIV treatment to stabilise.
PrEP is increasingly recognised as part of modern preventive healthcare – similar to vaccinations, routine screening, and proactive wellness strategies.
If you are unsure whether PrEP is right for you, speaking with a healthcare provider can help clarify your options and determine the safest and most effective prevention strategy for your needs.
Side Effects, Safety & Monitoring
PrEP medication is generally well tolerated and has been extensively studied worldwide for long-term HIV prevention. Most individuals experience little to no significant side effects when properly monitored under medical supervision.
Some people may experience temporary mild symptoms during the first few weeks, including:
- Nausea
- Mild stomach discomfort
- Bloating
- Headache
- Fatigue
These symptoms are usually short-lived and often improve as the body adjusts to the medication.
Because PrEP medications may affect kidney function in some individuals, routine blood testing and medical follow-up remain important. Your doctor may recommend:
- HIV testing every few months
- Kidney function monitoring
- STI screening
- Hep B assessment where appropriate
Regular monitoring helps ensure that PrEP remains safe, effective, and appropriate for your health profile over time.
Patients should also inform their doctor about:
- Existing medical conditions
- Supplements
- Prescription medications
- Hormone therapy
- Recreational drug use
At Sire, all PrEP prescriptions are supported by structured follow-up care and ongoing medical guidance to help patients maintain safe and effective HIV prevention long-term.
Why Patients Choose Sire for PrEP in Singapore
Choosing a HIV PrEP provider is not only about convenience – it is also about safety, confidentiality, and access to ongoing medical support.
At Sire, our telemedicine process is designed to make HIV prevention more accessible while maintaining proper doctor supervision and evidence-based care.
Patients choose Sire because we provide:
Singapore-Licensed Doctors
All consultations are conducted by licensed local doctors following MOH-aligned telemedicine practices.
Discreet Experience
From online consultations to medication delivery, every step is designed to protect your privacy and confidentiality.
Fast Access to Care
Same-day consultations may be available depending on appointment demand and clinical suitability.
Structured Follow-Up
PrEP requires ongoing monitoring. We help coordinate appropriate HIV testing, kidney monitoring, and follow-up reviews.
Flexible Treatment Approaches
Your doctor may advise daily or on-demand (2-1-1) PrEP depending on your lifestyle and risk profile.
Convenient Telemedicine
Avoid unnecessary clinic visits while still receiving professional doctor-led care from the comfort of home.
Whether you are starting PrEP for the first time or switching providers, Sire aims to make HIV prevention simpler, safer, and easier to access in Singapore.
Dr. Bosty Chan – MBChB (UK), MRCS
(Edinburgh), Cert. in Andrology (Men’s Health)
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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Skip clinic waiting rooms and forget app downloads. Simply access your account securely through our website, anytime.
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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.
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