A happy couple — ED is common and very treatable

Prescription-only · Pharmacist-reviewed · No video call

Sildenafil (generic Viagra)

The most established ED tablet and UK guidance’s first-line choice — the same active ingredient as Viagra, at a fraction of the price. Supplied only after our prescribing pharmacist reviews your confidential online consultation.

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Free consultation · pay only if approved · plain, unmarked packaging

GPhC-registered pharmacy Reviewed within 1 working day

Strengths & prices

Choose your strength — the pharmacist confirms it

Tap a strength to see the pack. Everyone new to sildenafil normally starts at 50 mg; 25 mg suits some (including 65+ or with certain medicines) and 100 mg is the maximum single dose. Your pharmacist confirms the right strength at review — nothing is dispensed automatically.

Generic sildenafil 25 mg film-coated tablets pack

Generic sildenafil 50 mg film-coated tablets pack

Generic sildenafil 100 mg film-coated tablets pack

Sildenafil tablets

Generic sildenafil · film-coated tablets · taken as needed, max one dose in 24 hours

StrengthQuantityPrice

25 mg2 tablets£1.00

50 mg4 tablets£7.49

100 mg4 tablets£8.19

Standard starting dose: 50 mg. New to ED treatment and picked 100 mg? The pharmacist will discuss starting lower first — that’s normal practice.

One-off or an ongoing 4-weekly supply — choose from 4 to 28 tablets at checkout (never more than one dose in 24 hours). Every supply is reviewed by our pharmacist first, whatever the size.

Start consultation — 50 mg →

Free · about 5 minutes · no video call · pay only if approved

Never take sildenafil with nitrates (e.g. GTN spray, isosorbide), nicorandil or ‘poppers’. The combination can cause a life-threatening drop in blood pressure. Our consultation screens for this — and if it applies to you, your GP or cardiologist is the right route for ED treatment.

What it is

How sildenafil works — and how to take it

How it works

Sildenafil is a PDE5 inhibitor — it increases blood flow to the penis when you’re sexually stimulated. It doesn’t cause an erection on its own, and it doesn’t affect desire. It’s the same active ingredient as branded Viagra, and therapeutically equivalent.

When to take it

Take one tablet about an hour before sex — it can work from 30 minutes and the window of effect is around 4 hours. A heavy or fatty meal can delay it, so lighter meals help. Maximum one dose in any 24 hours.

Getting the dose right

Most men start at 50 mg. Based on how you get on, the pharmacist can move you down to 25 mg or up to 100 mg (the maximum). Over-65s and men with kidney problems or on certain medicines often start at 25 mg.

What to expect

It can take a few tries to work its best — don’t judge it on one attempt. Alcohol in quantity works against it. If it’s still not working at the right dose, the pharmacist will review — switching tablet or checking for underlying causes with your GP.

Safety

Side effects and who should avoid it

Factual safety information from the licensed product information — the consultation checks every exclusion, and the pharmacist explains anything that applies to you.

Common, usually mild

Headache and facial flushing (the most common)
Blocked nose, indigestion, feeling dizzy
Temporary changes to vision (e.g. a blue tinge, light sensitivity)

These are dose-related and usually settle on their own.

Stop and seek urgent help if

Chest pain during or after sex
An erection lasting more than 4 hours (priapism)
Sudden loss or reduction of vision or hearing
Signs of a serious allergic reaction

Rare — but they need immediate medical attention.

Not suitable with: nitrates/nicorandil/poppers (never), riociguat, HIV protease inhibitors, severe liver disease, very low or uncontrolled high blood pressure, a heart attack or stroke in the last 6 months, unstable angina, severe heart failure, certain eye conditions (NAION, retinitis pigmentosa), or conditions predisposing to priapism. Caution and lower doses with alpha-blockers, some antifungals and antibiotics, and kidney problems — the consultation covers each of these, and the pharmacist makes the decision. Report side effects via the MHRA Yellow Card scheme (yellowcard.mhra.gov.uk).

How it works

From question to discreet delivery

Answer online

A confidential 5-minute questionnaire built on the official clinical criteria — no video call needed.

Pharmacist reviews

Our prescribing pharmacists personally review your answers, usually within one working day, and confirm the right strength.

Discreet supply

Collect in store, or plain unmarked tracked delivery. Payment only once the pharmacist has approved.

Ongoing support

Dose review if it’s not working well, side-effect advice, and a GP referral whenever that’s the safer route.

Common questions

Sildenafil, answered plainly

Is generic sildenafil as good as Viagra?

Yes — it contains the same active ingredient at the same strengths, made to the same MHRA standards, and is therapeutically equivalent. The difference is price.

Which strength should I choose?

Most men start at 50 mg — that’s the licensed standard starting dose. You can request a strength in the consultation, and the pharmacist confirms the right one for you (over-65s and men on certain medicines often start at 25 mg).

How long does it last?

The window of effect is around 4 hours from taking it. It only works with sexual stimulation — it doesn’t cause an erection on its own. Prefer a longer window? Tadalafil lasts up to 36 hours.

Do I need a video call?

No — you complete the confidential questionnaire and our prescribing pharmacist reviews it personally, usually within one working day, and phones only if something needs clarifying.

Can I take it with alcohol?

A small amount is fine, but alcohol in quantity both increases side effects (dizziness, low blood pressure) and works against the erection you’re trying to help. Keep it light.

Ready to start?

Free consultation · No video call · A personal decision from our pharmacists

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Important. Sildenafil is a prescription-only medicine supplied under a Patient Group Direction after a structured clinical check. Our prescribing pharmacists personally review every consultation and make the final decision — nothing is approved automatically, and where your GP is more appropriate we will say so. This page is factual service information, not a recommendation to use any medicine. Never combine sildenafil with nitrates, nicorandil or ‘poppers’; it gives no protection against sexually transmitted infections.