Viagra UK: Complete Treatment Requirements Guide

Viagra is a prescription medicine approved by the MHRA for treating erectile dysfunction in adult men. This comprehensive checklist covers everything you need to know about accessing Viagra in the UK, from eligibility requirements to dosage guidelines. EverydayMeds offers both branded Viagra and the more affordable generic sildenafil option following an online consultation with our UK-licensed prescribers.

  • Complete online medical assessment with UK-licensed prescriber
  • Must be aged 18 or over with diagnosed erectile dysfunction
  • Declare all current medications to avoid dangerous interactions
  • Choose between branded Viagra or generic sildenafil at checkout
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Not sure which one? Here's the honest comparison.

Sildenafil
~60 min
~4 hrs
you like to plan ahead
Tadalafil (as-needed)Most prescribed
~30 min
up to 36 hrs
you want a whole weekend covered
Tadalafil Daily
always active
continuous
you never want to think about timing
Vardenafil
~15–30 min
~8 hrs
you want the fastest onset

How ED treatment works in your body.

Increases blood flow

Increases blood flow

When PDE5 is suppressed, blood is able to flow more freely through the body—including to the (you guessed it) penis.

Increase erections

Increase erections

More blood flow to the penis means harder, more satisfying erections once you're sexually stimulated.

Essential Requirements for Viagra Prescription

Eligibility and Medical Assessment Requirements

To obtain Viagra in the UK, you must be an adult male aged 18 or over experiencing erectile dysfunction. The MHRA requires all patients to complete a thorough medical assessment with a UK-licensed prescriber before treatment can be approved. This assessment evaluates your cardiovascular health, current medications, and medical history to ensure Viagra is safe and appropriate for you.

Contraindications and Safety Considerations

Certain medical conditions and medications make Viagra unsuitable. You cannot take Viagra if you're using nitrate medications such as GTN spray or isosorbide, as this creates a dangerous drug interaction. Other contraindications include severe heart disease, recent heart attack or stroke within six months, severe liver impairment, or very low blood pressure. Always declare your complete medical history during consultation.

Dosage Options and Administration Guidelines

Viagra is available in 25mg, 50mg, and 100mg strengths. The typical starting dose is 50mg, taken 30-60 minutes before sexual activity. Based on effectiveness and tolerability, your prescriber may adjust this to 25mg or increase to 100mg. You must not exceed one dose per 24-hour period. Fatty meals may delay the medication's onset of action.

Treatment Options: Branded vs Generic

EverydayMeds offers both branded Viagra manufactured by Pfizer and generic sildenafil containing the same active ingredient. Both medications work identically, with generic sildenafil providing a more cost-effective option. You can choose your preferred option during checkout following successful consultation. Both require the same prescription process and medical assessment.

How Viagra Works and Expected Results

Viagra is a PDE5 inhibitor that increases blood flow to the penis when you're sexually aroused. The medication does not cause automatic erection - sexual stimulation is still required. Effects typically begin within 30-60 minutes and may last 4-6 hours, though this doesn't mean erection duration. The medication enhances your natural response to sexual stimulation rather than replacing it.

What you need to know about erectile dysfunction

It's one of the most common conditions we treat, and one of the most treatable.

What is Erectile Dysfunction?
ED means finding it hard to get or keep an erection firm enough for sex. It's not unusual to have an off night; the point at which it's worth doing something is when it's happening regularly, or when it's starting to bother you.
How will I feel when I take ED medication?
For most men, nothing feels different day to day. The medication works in the background — when you're sexually aroused, it helps blood flow where it's needed, so erections come more easily and last longer. It doesn't cause arousal on its own. Some men notice mild, short-lived effects like a headache, facial flushing or a stuffy nose, which usually pass as the dose wears off.
Why do I need a prescription for ED medication?
ED treatments are prescription-only medicines in the UK because they aren't suitable for everyone — for example, alongside certain heart conditions or medications like nitrates. That's why we ask you to complete a short online consultation first. A UK-registered prescriber reviews your answers to make sure your chosen treatment is safe and right for you before it's dispensed.
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