Last Updated

Jun 10, 2026

Viagra Singapore: The Complete 2026 Guide to Erectile Dysfunction Treatment at Sire

Written by Editorial Team

Key Information

Viagra (sildenafil) is a prescription-only ED treatment in Singapore that improves blood flow to help men achieve erections. It works within 30–60 minutes and lasts 4–6 hours. Safe use requires medical screening, as alternatives like Cialis, Spedra, or ESWT may suit different needs. Treatment should always be doctor-guided.

Go to FAQ

Last Updated: Jun 10, 2026

Viagra Singapore: The Complete 2026 Guide to Erectile Dysfunction Treatment at Sire

Written by Editorial Team

Key Information

Viagra (sildenafil) is a prescription-only ED treatment in Singapore that improves blood flow to help men achieve erections. It works within 30–60 minutes and lasts 4–6 hours. Safe use requires medical screening, as alternatives like Cialis, Spedra, or ESWT may suit different needs. Treatment should always be doctor-guided.

Go to FAQ

Restoring Confidence with Viagra in Singapore

Erectile dysfunction (ED) is more common than most men realise – affecting nearly 1 in 3 men over 40 in Singapore. While it can be distressing, modern medicine offers safe, proven solutions that help men regain their confidence and sexual performance. 


Viagra Singapore – 100mg

  • A single tablet contains 100mg of Sildenafil and is taken on demand
  • A fast-acting PDE-5 inhibitor that works within 4-6 hours

Starting from $22/ dose


At Sire – Singapore’ Men’s Health Clinic, we provide doctor-prescribed Viagra (Sildenafil) and alternative medications such as Cialis (Tadalafil) and Spedra (Avanafil). For patients seeking non-pill therapies, we also offer Extracorporeal Shockwave Therapy (ESWT) – a clinically proven treatment to naturally improve erectile function.

What is Viagra and How Does It Work?

blue sildenafil tablet representing Viagra in Singapore
Illustration of a blue sildenafil tablet — the active ingredient in Viagra, used to treat erectile dysfunction in Singapore.

Viagra is a prescription medication used to treat erectile dysfunction (ED). Its active ingredient, sildenafil citrate, belongs to a class of drugs known as PDE5 inhibitors. These medications work by:

  • Relaxing blood vessels in the penis
  • Increasing blood flow during sexual arousal
  • Helping men achieve and maintain a firm erection suitable for sexual activity

Viagra requires sexual arousal to work – it won’t generate spontaneous erections or raise libidido. Think of it as enabling your body to respond more effectively when you’re already in the mood.

Is Viagra Legal in Singapore?

Yes — Viagra (sildenafil) is legal but it is a prescription-only medication under the Health Sciences Authority (HSA). That means:

  • A Singapore-licensed doctor must evaluate you and issue a prescription if appropriate.
  • Buying pills from unverified overseas or marketplace sellers is illegal and risky. Counterfeit pills can contain dangerous substances or incorrect doses.
  • Sire provides legal, doctor-prescribed medication and delivery within Singapore. 

At Sire, consultations are private, professional, and discreet – either by appointment-only in-clinic or through a confidential teleconsultation. If suitable, our doctor will prescribe Viagra or an alternative ED treatment tailored to your medical history and lifestyle.

How to Get Viagra in Singapore (Step-by-Step)

Option A – Telemedicine with Sire (recommended for privacy & convenience)

Viagra packed in discreet unit packaging at SIRE
Individual pills packed into discreet dosing sachets that are the size of a condom pack.

  1. Fill a short online medical questionnaire (~2-5 minutes).
  2. Have a confidential teleconsultation with a Singapore-licensed doctor via secure chat.
  3. If appropriate, our doctors will provide you with a prescription.
  4. Get discreet delivery of genuine medication to your address.
  5. Arrange follow-up or subscription refills if needed.

You can get started with us conveniently and legally here. 

Option B – GP or Specialist Visit

  • Visit your GP for an in-person consultation. If complex, your GP may refer you to a urologist.
  • Face-to-face allow physical examination and tests but may feel less private.

Option C –  Pharmacy (with prescription)

  • Bring a valid prescription to local pharmacies (Guardian, Watsons, Unity) to collect medication. Pharmacies in Singapore cannot dispense without a valid prescription.

Viagra vs Cialis vs Spedra: Which is Best for You?

ed medications in sire discreet packaging

Sire prescribes a tailored option based on your health, timing needs, and side effect profile.

ED Medication Active Ingredient Typical Onset Typical Duration Best for
Viagra Sildenafil 30–60 minutes 4–6 hours Reliable short-term use; predictable timing
Cialis Tadalafil 30–45 minutes Up to 36 hours “Weekend” spontaneity; daily low-dose option available
Spedra Avanafil 15–30 minutes ~6 hours Fastest onset – great for spontaneity

Noted: Levitra (Vardenafil) is not available in Singapore – we discuss why in this separate blog article.

Need more details? Read our comparison guides here: Viagra vs Cialis, Viagra vs Spedra, Cialis vs Spedra.  

Our doctors will discuss which ED medication is safest and most convenient for you, considering current health, medications (e.g. nitrates), and preferences.

What Causes Erectile Dysfunction?

Erectile dysfunction can stem from physical, psychological, or mixed factors. Common causes include:

  • Age-related vascular changes
  • Chronic diseases (diabetes, high blood pressure, high cholesterol)
  • Hormonal imbalances (low testosterone)
  • Medications (antidepressants, blood pressure drugs)
  • Psychological stress, anxiety, or relationship issues
  • Lifestyle factors such as smoking, alcohol use, or obesity

Sometimes, ED can be an early sign of heart disease or diabetes, making it important to get properly evaluated.

How to Know if You Have Erectile Dysfunction

You might have ED if you experience:

  • Difficulty getting or maintaining an erection
  • Erections that are too soft for penetration
  • Reduced sexual satisfaction or performance anxiety

A simple diagnostic guide called the International Index of Erectile Function (IIEF) can help assess the severity. But the most accurate diagnosis comes from a men’s health doctor – such as at Sire.

How to Take Viagra for Best Results

To maximise Viagra’s effectiveness:

  1. Take it 30-60 minutes before sexual activity.
  2. Avoid heavy or fatty meals – these can delay absorption.
  3. Limit alcohol consumption, as it may reduce response.
  4. Stay relaxed – stress and anxiety can reduce effectiveness.
  5. Always follow your doctor’s prescribed dosage (usually 25-100 mg).

Remember: Viagra helps you get an erection only with arousal, not automatically.

Viagra vs Testosterone Support (Tongkat Ali): What’s the Difference?

difference between viagra and tongkat ali

At Sire, some men ask whether they should take Viagra or a men’s health supplement such as Sire Testosterone Support featuring Tongkat Ali.

While both can improve sexual wellbeing, they work in completely different ways and serve different needs. 

Viagra (Sildenafil) vs Testosterone Support (Tongkat Ali)
Feature Viagra (Sildenafil) Testosterone Support (Tongkat Ali)
Primary Function Helps achieve and maintain an erection by improving blood flow to penile tissue (PDE5 inhibitor). Supports natural testosterone production to enhance libido, energy, and mood.
Best For Men who can’t achieve or sustain erections during sexual activity. Men experiencing low sex drive, fatigue, or mild age-related hormonal decline.
Onset of Action Works within 30–60 minutes before sex. Gradual benefits seen after 2–4 weeks of consistent daily use.
Prescription Needed Yes – available only with a doctor’s prescription in Singapore. No – supplement available over the counter.
Effect on Libido Does not directly boost sexual desire. Can naturally increase sexual desire and stamina.
Duration of Effect 4–6 hours per dose. Continuous hormonal support with regular use.
Combination Use Can be used together safely under medical supervision. Often complements ED medications and lifestyle changes.

In summary:

  • Viagra treats the physical mechanism of erection (blood flow).
  • Tongkat Ali addresses the hormonal foundation that drives libido and energy. 

They are not substitutes, but they can work synergistically when prescribed or guided by a qualified doctor.

At Sire, we help men identify whether their symptoms stem from vascular, hormonal, or psychological factors – and then tailor a plan that may include Viagra, Cialis, Spedra, testosterone support, or ESWT therapy for natural recovery. 

How Long Until Viagra Works? (and what to expect)

  • Onset: 15-60 minutes (Spedra can work faster; Viagra generally 30-60 min)
  • Peak: 1-2 hours
  • Duration: 4-6 hours (Viagra); Spedra ~6 hours; Cialis up to 36 hours)
  • Requirement: sexual stimulation is necessary – Viagra helps the physiological response, it doesn’t cause desire.

If you don’t get the expected result, don’t panic – your Sire doctor can adjust dose, try Spedra/Cialis, or investigate underlying causes. 

Safety, Side Effects & Drug Interactions (what to check before taking Viagra)

When used as prescribed, sildenafil and other PDE5 inhibitors are generally safe – but screening is essential.

Common side effects (usually mild & transient)

  • Headache 
  • Facial flushing
  • Dizziness
  • Nasal congestion
  • Indigestion
  • Mild visual changes (rare temporary effect)

Serious warnings – STOP and seek urgent care

  • Priapism: erection > 4 hours – go to A&E immediately.
  • Chest pain or fainting – stop sexual activity and seek emergency care.
  • Sudden vision or hearing loss – urgent medical attention required. 

Contraindications & interactions

  • Do not combine PDE5 inhibitors with nitrates (e.g. glyceryl trinitrate). The combo can cause dangerous hypotension.
  • Caution with alpha-blockers (for prostate), certain antifungals, macrolide antibiotics, and some HIV protease inhibitors – your doctor will review your meds.
  • Grapefruit can increase sildenafil blood levels – avoid within 24 hours of dosing.

Sire doctors screen all contraindications during consults and provide clear, tailored safety guidance. 

Common Reasons Viagra May Not Work & What We Do About It

  • Wrong timing (taken too close to a heavy meal) – try on an empty stomach or adjust timing.
  • Insufficient dose – doctor may increase dose safely (within 100 mg/24 hr limit for sildenafil unless contraindicated).
  • Underlying medical issues (diabetes, low testosterone, vascular disease) – treat the root cause.
  • Psychological factors (performance anxiety) – counselling or sex therapy helps.
  • Drug interactions – review current meds with your doctor.

At Sire we personalise treatment: medication adjustments, tests for underlying disease, or ESWT if vascular ED is suspected. 

Alternative Treatment: ESWT (Extracorporeal Shockwave Therapy)

For men seeking natural improvement without pills or tablets, Sire offers ESWT (Extracorporeal Shockwave Therapy) – available by appointment only at our clinic.

illustration of ESWT done at SIRE clinic

What is ESWT?

ESWT is a non-invasive, painless treatment that uses low-intensity sound waves to:

  • Stimulate the growth of new blood vessels (neovascularisation)
  • Improve penile blood flow
  • Enhance natural erectile function

Who is it for?

ESWT is ideal for men who:

  • Cannot take oral ED medications
  • Prefer drug-free solutions
  • Have vascular-related ED (e.g. due to diabetes, hypertension)

What to Expect at Sire

Each session lasts about 20 minutes, with no downtime – you can resume normal activities immediately.

Most patients notice improvement after 6-12 sessions, depending on individual response. 

Other ED Treatments Available at Sire

Depending on the root cause, we may also recommend:

All treatments are supervised by licensed doctors to ensure safety and effectiveness. 

Cost & Subscription Options of ED Treatment in Singapore

SIRE ED Medications

  • Teleconsult + prescription: from $25 only at Sire
  • Generic sildenafil (per pill): from $10 (depends on dose and subscription)
  • Branded Viagra (per pill): from $20 depending on dose
  • Spedra (per pill): from $25 depending on subscription
  • Cialis (per pill): from $9 depending on generic or branded option (or daily low-dose plans)
  • ESWT: per-session pricing; package of 6-12 sessions recommended

Tip: Telemedicine subscriptions (auto-refill + doctor follow-up) often reduce per-pill costs and ensure continuity of care. 

Can You Treat ED Without Medication?

Yes. Besides ESWT, improving your overall health can make a significant difference. Our doctors often recommend:

  • Regular exercise to enhance blood circulation
  • Balanced diet and weight management
  • Stress reduction techniques
  • Limiting alcohol and avoiding smoking

These steps, combined with targeted treatment, can help many men regain natural erections over time.

Frequently Asked Questions About Viagra in Singapore

Can I Take Tongkat Ali and Viagra Together?

Yes — in most cases, taking Tongkat Ali and Viagra together is safe and may even enhance overall results. However, you should always consult a Singapore-licensed doctor before combining supplements and prescription medication to ensure there are no contraindications or overlapping side effects.

Is ESWT safe?

Yes – ESWT is clinically proven, pain-free, and has no known serious side effects when performed by qualified professionals.

Why Choose Sire for Your ED Treatment in Singapore

visualisation of SIRE ED medication

Sire is a trusted men’s health clinic dedicated to treating sexual health concerns with privacy, expertise, and empathy.

Why Patients Choose Us:

  • Experienced doctors specialising in male sexual health
  • HSA-approved medications and medical-grade treatments
  • Confidential consultations (in-person or online)
  • Access to Viagra, Cialis, Spedra, and ESWT therapy
  • Holistic approach addressing both physical and psychological aspects

Your treatment is tailored to restore not just your erection, but your confidence and relationship satisfaction.

Take the First Step Towards Better Performance

If you’re struggling with erectile dysfunction, you’re not alone – and you don’t need to suffer in silence.

At Sire, we offer personalised, effective treatments for ED including Viagra, Cialis, Spedra, and ESWT shockwave therapy.

Book a confidential appointment online today.

Disclaimer: Articles on Sire are for informational purposes only and do not constitute medical advice, diagnosis, or treatment. Always consult a licensed doctor for personalised medical advice.

FAQs

No. Only HSA-approved, doctor-prescribed Viagra is legal. Online “Viagra” sold without a prescription is often counterfeit or unsafe.

Prices vary depending on brand (Pfizer or generic) and dosage. Consultation at Sire includes full doctor assessment and prescription.

No physical addiction. Psychological dependence is possible but uncommon. Address the root cause if you rely on it purely for confidence.

Viagra is designed for male erectile function; it is not approved for female use in Singapore.

When prescribed correctly, long-term use is generally safe. Regular medical follow-up is recommended.