Viagra Tablets: Essential UK Prescribing Information

Viagra tablets contain sildenafil citrate, a prescription medication for treating erectile dysfunction in adult men. Available in 25mg, 50mg and 100mg strengths, Viagra requires a valid prescription following clinical assessment. EverydayMeds offers both branded Viagra and generic sildenafil options, allowing patients to choose based on preference and budget during checkout.

  • Viagra contains sildenafil citrate, works by increasing blood flow to the penis
  • Available in 25mg, 50mg, 100mg strengths - typically starting at 50mg
  • Take 30-60 minutes before sexual activity, effects may last 4-6 hours
  • Requires prescription after clinical consultation with UK-licensed prescriber
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Not sure which one? Here's the honest comparison.

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

Viagra Dosage, Side Effects & Prescription Requirements

How Viagra Tablets Work

Viagra tablets contain sildenafil citrate, which belongs to a group of medicines called PDE5 inhibitors. When sexually aroused, sildenafil helps increase blood flow to the penis by relaxing blood vessels. The medication does not cause automatic erections - sexual stimulation is still required for effectiveness.

Viagra Dosages Available

Viagra is available in three tablet strengths: 25mg, 50mg, and 100mg. Most men start with the 50mg dose, which may be adjusted to 25mg or 100mg depending on effectiveness and side effects. Only one tablet should be taken within 24 hours, approximately 30-60 minutes before planned sexual activity.

Common Side Effects

Like all medicines, Viagra may cause side effects. Common reactions include headache, facial flushing, indigestion, and nasal congestion. These effects are usually mild and temporary. Serious side effects are rare but may include sudden vision or hearing loss, chest pain, or prolonged erections lasting over 4 hours requiring immediate medical attention.

Who Can Take Viagra

Viagra is suitable for adult men diagnosed with erectile dysfunction following clinical assessment. The medication is not appropriate for women, men under 18, or those taking nitrate medications for heart conditions. A thorough medical consultation evaluates cardiovascular health, current medications, and medical history before prescribing.

Branded vs Generic Options

EverydayMeds offers both branded Viagra (manufactured by Pfizer) and generic sildenafil containing the same active ingredient. Generic sildenafil provides equivalent effectiveness at a lower cost. Patients can select their preferred option during the checkout process following successful clinical assessment.

Important Safety Information

Never combine Viagra with nitrate medications such as GTN sprays or isosorbide tablets, as this may cause dangerous drops in blood pressure. Alcohol may reduce effectiveness and increase side effects. Grapefruit juice should be avoided as it may affect how the body processes sildenafil.

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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