Viagra is supplied only after review by a UK-registered prescriber. Medication is dispensed by a GPhC-registered pharmacy. No treatment is provided without a medical consultation. Viagra is MHRA-approved and unsuitable for patients taking nitrates or with certain heart conditions.
Viagra in the UK
Simple Guide for Patients:
Viagra is a treatment for erectile dysfunction (ED).
ED means difficulty getting or keeping an erection.
Viagra has helped millions of men worldwide.
It is safe and effective when prescribed correctly.
Viagra is a treatment for erectile dysfunction (ED).
ED means difficulty getting or keeping an erection.
Viagra has helped millions of men worldwide.
It is safe and effective when prescribed correctly.
What Is Viagra?
Viagra is a tablet.
It is taken before sexual activity.
The active ingredient is sildenafil.
This helps increase blood flow to the penis.
Viagra only works with sexual stimulation.
It does not increase sex drive.
How Does Viagra Work?
Viagra relaxes blood vessels.
This improves blood flow to the penis.
This makes it easier to get an erection.
It also helps keep the erection firm.
Most men feel effects in 30 to 60 minutes.
The effect can last up to 4 hours.
How to Take Viagra
Take Viagra when you need it.
Do not take more than one tablet per day.
Swallow the tablet with water.
It works best on an empty stomach.
Avoid heavy meals before taking it.
Too much alcohol can reduce its effect.
Viagra Dosages in the UK
Viagra comes in different strengths.
25 mg – lower dose
50 mg – most common starting dose
100 mg – highest dose
Your prescriber will choose the right dose for you.
This depends on your health and response.
Who Can Use Viagra?
Viagra is suitable for many men.
It can help if ED is caused by:
Stress or anxiety
Age-related changes
Poor blood flow
You should not take Viagra if you:
Use nitrate medicines
Have serious heart problems
Have very low blood pressure
A medical check is always needed first.
Possible Side Effects
Most men have no serious problems.
Common side effects include:
Headache
Flushing
Blocked nose
Indigestion
These are usually mild and short-lasting.
Get medical help if you have:
Chest pain
Vision or hearing problems
An erection lasting over 4 hours
Viagra and Sildenafil – What’s the Difference?
Viagra is the brand name.
Sildenafil is the generic version.
They work the same way.
They contain the same active ingredient.
Sildenafil usually costs less.
Both are equally effective when prescribed.
Buying Viagra Online in the UK
Viagra is a prescription medicine in the UK.
Buying from unregulated websites is unsafe.
Fake medicines are common online.
A legal service must include a medical review.
How Our Online Service Works
Complete a short online consultation
A UK prescriber reviews your answers
A prescription is issued if suitable
Medication is delivered discreetly
No GP visit needed.
No pharmacy queues.
Why Choose London Luton Clinic?
UK-registered prescribers
Genuine medication only
Discreet delivery
Clear pricing
Safe and private service
Your health and privacy matter.
Genuine medication only
Discreet delivery
Clear pricing
Safe and private service
Your health and privacy matter.
Ready to Get Started?
Erectile dysfunction is common.
Treatment is available.
Help is simple and confidential.
Start your online consultation today.
Get safe, prescribed Viagra in the UK.
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Medically reviewed by:
Rupesh Shah, Independent Prescribing Pharmacist (UK)
GPhC Reg No: 2048914
Last reviewed: Jan/2026
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About the Author
Rupesh Shah, Independent Prescriber & Pharmacist
GPhC Registered | 20+ years clinical experience
Rupesh Shah is a UK-registered pharmacist and independent prescriber with extensive experience in men’s health, erectile dysfunction treatments, and online prescribing services. He is the Clinical Lead at London Luton Clinic and is committed to providing safe, evidence-based care.
Medical Review
Medically reviewed by: Rupesh Shah, Independent Prescriber
Last reviewed: 13 January 2026
This article has been medically reviewed to ensure clinical accuracy, safety, and compliance with UK prescribing guidelines.
Medical Disclaimer
This article is for general information only and does not replace a consultation with a qualified healthcare professional. Always seek medical advice before starting treatment.
Ready to Take the Next Step?
If erectile dysfunction is affecting your confidence or wellbeing, professional help is available.
Start a private online consultation with OUR UK-registered prescriber today.
Sources & References
- NHS. Erectile dysfunction (impotence)
- NHS. Buying medicines online safely
- NICE Clinical Knowledge Summaries – Erectile Dysfunction
- British National Formulary (BNF). Sildenafil
- Electronic Medicines Compendium (EMC). Viagra (sildenafil) – Summary of Product Characteristics (SPC)
- Medicines and Healthcare products Regulatory Agency (MHRA). Guidance on prescription medicines and avoiding counterfeit medicines
- General Pharmaceutical Council (GPhC). Regulation of online pharmacies and prescribers in the UK
