Erectile dysfunction · Taken when needed

Sildenafil tablets for erectile dysfunction

Sildenafil is a prescription-only tablet for erectile dysfunction, and the same active ingredient as Viagra. It's taken about an hour before sex, and only works when you're aroused.²

From £13.98 a month

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CQC registered
UK-registered clinicians
Plain, discreet delivery

82%of men had improved erections at 100mg, vs 25% on placebo¹

1 hourtake it about an hour before sex²

All content on this page has been medically reviewed by Naeem Teni, Clinical Lead. GPhC 2215591.

Pricing

Pick a strength, pick a pack.

Your clinician sets the strength. The bigger the pack, the less each one costs.

Strength

25mg

4 tablets£3.75 each£14.98

8 tablets£2.62 each£20.98

16 tablets£2.25 each£35.98

Strength

50mg

4 tablets£3.50 each£13.98

8 tablets£2.50 each£19.98

16 tablets£1.81 each£28.98

Strength

100mg

4 tablets£5.50 each£21.98

8 tablets£3.62 each£28.98

16 tablets£2.69 each£42.98

What the trials showed

82%

of men had improved erections at 100mg, vs 25% on placebo¹

Men reporting improved erections

Placebo25%

25mg62%

50mg74%

100mg82%

Fixed-dose clinical trials of sildenafil. Results vary from person to person.¹

How to time it

An evening, timed.

About 1 hour before

Take one tablet

Swallow it with water. A heavy or fatty meal can slow it down.²

When you're aroused

It helps

It supports getting and keeping an erection, as long as there's arousal.

Every 24 hours

One dose, max

Never take more than one dose in a day.²

How it works

What it does in the body.

1Blood flow, not desire

An erection depends on blood flowing into the penis. Sildenafil helps the blood vessels there relax, so more blood can reach where it's needed.²

2It blocks an enzyme called PDE5

When you're aroused, your body makes a messenger that keeps those vessels open. PDE5 breaks it down. Sildenafil slows PDE5, so the effect holds.²

3Arousal still has to happen

It won't cause an erection on its own. You still need to be sexually stimulated.

4It treats the symptom, not the cause

ED can be an early sign of heart or blood-sugar problems, which is why a clinician looks at the whole picture first.

Simple to take, easy to plan.

Step 1

Plan ahead

Take it about an hour before sex.²

Step 2

Watch the meal

A big or fatty meal beforehand can delay it working.²

Step 3

One a day, max

No more than one dose in 24 hours.²

Step 4

Give it a few tries

It doesn't always work the first time. If it isn't helping, your clinician can adjust the dose.

Drinking? A lot of alcohol makes erections harder to get, with or without treatment.

Is it right for me?

Who it suits, and what to expect.

May be considered if

All of these usually apply

You're an adult (18 or over) living in the UK.
You've had trouble getting or keeping an erection often.
You're happy for a clinician to look at what might be causing it, not just treat the symptom.
A clinician judges it safe with your health history and anything else you take.

Not suitable if

Any one of these rules it out

You take nitrates (for chest pain or heart conditions), the combination can be dangerous.
You have certain heart or blood-pressure conditions a clinician will ask about.
You're allergic to sildenafil or any of its ingredients.
A clinician decides the possible side effects or risks outweigh the benefit.

Not sure where you fit? You don't need to work it out yourself. The assessment asks the right questions, and a clinician checks your answers.

Most side effects are mild and pass as the tablet wears off.²

More common

Usually mild, and often short-lived.

HeadacheFlushingIndigestionBlocked noseDizzinessBlurred or tinted vision

Get help straight away if

These are rare, but need a doctor quickly.

An erection lasting more than 4 hours. This needs urgent treatment to avoid lasting damage.
Sudden loss of vision in one or both eyes.
Sudden loss or reduction of hearing, sometimes with ringing or dizziness.
Chest pain during or after sex. Stop, sit up, and don't use a nitrate spray.

Never with nitrates or poppers. Taking sildenafil with nitrates (for chest pain) or poppers can drop your blood pressure dangerously.²

Sildenafil or tadalafil?

Trial figures come from different studies in different men, so they aren't a direct ranking. Your clinician will talk through which suits your routine.

This page

Sildenafil

82%at 100mg¹

About 1 hour before sex
A few hours

From £13.98

Tadalafil

81%at 20mg³

At least 30 minutes before sex
Up to 36 hours

From £12.98 View →

Common questions

Sildenafil, answered.

Is Manova a proper clinic, or a website?

Both. We’re a CQC-registered clinic that happens to live online. Every prescription is signed off by a registered clinician, not an algorithm.

Will it turn up in a branded box at my office?

No. Plain brown packaging, no Manova branding, no clue what’s inside. Sent to a home or pickup address, your call.

What if the clinician says no?

Then they say no, and you don’t get charged. They might suggest a safer alternative, more tests, or refer you back to your GP. We’d rather lose a customer than push the wrong treatment.

Am I locked into a contract?

Nope. It’s month-to-month, cancel from your account anytime. No retention agent calling you back.

How is this different from going to my GP?

It isn’t, really. Same medicine, same regulator, same standards. We’re just faster to get hold of, and a lot less awkward to talk to about the things on this page.

Guides

Read up on Sildenafil.

All Sildenafil guides →

References (3)

Viagra (sildenafil) European Public Assessment Report, scientific discussion. European Medicines Agency.
Viagra (sildenafil) Summary of Product Characteristics. Electronic Medicines Compendium (EMC).
Brock GB, et al. Efficacy and tolerability of tadalafil in men with erectile dysfunction. J Urol. 2002;168:1332–1336.