Viagra UK: Your Essential Patient Guide

Need quick answers about Viagra in the UK? Our comprehensive guide covers everything from how Viagra works to dosages, side effects, and eligibility. EverydayMeds offers both branded Viagra and generic sildenafil options through our secure online consultation service. Get the facts you need to make informed decisions about your erectile dysfunction treatment with trusted, UK-licensed healthcare professionals.

  • Prescription-only medicine requiring clinical assessment
  • Available in 25mg, 50mg, and 100mg strengths
  • Choice between branded Viagra or generic sildenafil
  • Takes 30-60 minutes to work, effects last 4-6 hours
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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.

Complete Patient Information for Viagra UK

How Does Viagra Work?

Viagra contains sildenafil citrate, a PDE5 inhibitor that blocks the phosphodiesterase type 5 enzyme. This increases blood flow to the penis when you're sexually aroused. It's important to understand that Viagra doesn't cause automatic erections - sexual stimulation is still required. The medication typically works within 30-60 minutes of taking it, with effects lasting 4-6 hours.

Dosages and Administration

Viagra is available in three strengths: 25mg, 50mg, and 100mg tablets. Most men start with the 50mg dose, which can be adjusted based on effectiveness and tolerability. Take your prescribed dose 30-60 minutes before sexual activity, and never exceed one dose in 24 hours. Food, especially fatty meals, can delay how quickly the medication works.

Who Can Take Viagra?

Viagra is suitable for adult men over 18 experiencing erectile dysfunction. However, it requires a prescription following consultation with a UK-licensed prescriber. Our clinical assessment evaluates your cardiovascular health, current medications, and medical history to ensure safe treatment. The medication is not suitable for women or anyone under 18 years old.

Important Safety Information

Certain medical conditions and medications make Viagra unsuitable. Never take Viagra if you're using nitrates like GTN spray or isosorbide, as this creates a dangerous interaction. It's also contraindicated for men with severe heart disease, recent heart attack or stroke, severe liver problems, or very low blood pressure. Always disclose your complete medical history during consultation.

Viagra vs Generic Sildenafil

EverydayMeds offers both branded Viagra and generic sildenafil at checkout. Both contain the same active ingredient (sildenafil citrate) and work identically. The main difference is cost - generic sildenafil provides the same effectiveness at a lower price point. Your choice depends on personal preference and budget considerations.

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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Step 2

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Step 3

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Frequently asked questions