It's the active ingredient in Viagra. Clinically proven to be highly effective by increasing blood flow into the penis.

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Erections really aren’t that easy. For a lot of younger men as well. About 40% of men have erection difficulties by age 40. But help is here.


It works by inhibiting an enzyme known as PDE5 associated with muscle contraction in your penis. Sildenafil allows the blood vessels to relax and expand, leading to increased blood flow into the penis. Which means easier erections for most men. You’ll still need to be sexually stimulated though. So get in the mood! Find out more in ERECTIONS 101.


Howeffectiveis it?

80% of men get the results they want from Sildenafil - a strong erection.

Light some candles, put on some Barry White, game face on. We’re back in business.

How effective is it?

Why has hard got harder?

Your brain, heart, hormones and a few other bits and bobs all need to come together – this can be tricky at any age. Sometimes these things don’t gel so well, and you can’t get or stay hard enough to have satisfactory sex - this is known as erectile dysfunction. Sildenafil is one option for men with ED, whatever the cause, it usually helps.

Is this Viagra?

It’s exactly the same active ingredient as Viagra. Just without the branding. Rest assured you’re getting the same results.



If prescribed, you still need to be sexually aroused for it to work, so everything needs to be exciting. You’ve got this.


Take a pill an hour before you want to have sex. Sildenafil starts to work within 30-60 mins and maximum erection potential happens around the 1 hour mark.


Sildenafil lasts for around 4 hours, (sometimes longer for some lucky men)! So relax, no need to rush.


What causes erectile dysfunction?

There are many causes of ED, generally split into psychological or organic/psychological causes (such as medications, hormonal, neurovascular, anatomical factors). In many patients it can be a combination of factors, and so we advise having a checkup by a doctor. We give comprehensive guidance on what you should have checked with our prescription message.

When and how to start treatment/should I start treatment?

Approximately 40% of men are affected by ED at age 40 and nearly 70% of men at age 70. So it's very common. However, the statistics show most men don’t seek treatment for it.

So if your having erectile dysfunction, don’t ignore it. There is plenty that can be done to help. You should also have a health check and see what might be causing it.

If you decide to treat the problem, an oral medication like Sildenafil is the most popular and common way to start. Many men find it really improves their sexual confidence to have access to it in their time of need. So over time their erections improve, and they can stop needing medication.

For others, it’s just there whenever they need it and that's ok. Provided you take it as prescribed, it's not doing you any harm.

We are experts at prescribing for erectile dysfunction online. We’ll ensure it's safe for you, and give all the advice and guidance you need. We’re here for you.

How effective is it?

It’s suggested that 80% of men who take Sildenafil achieve erections strong enough for sex.

Sildenafil (Viagra) was the first treatment to be clinically approved to treat erectile dysfunction. Since then a number of similar medications have come onto the market, such as Cialis, Levitra, and Spedra. In a review of 82 trials covering over 47,000 patients, Sildenafil 50mg was found to be the most effective of all other comparable medications. Hence why it's our treatment of choice.

How long does Sildenafil work for?

Sildenafil starts to work within 30-60 mins and maximum erection potential happens after the one hour mark. It should last around four hours, in some cases longer.

Are there any side effects?

If present, side effects from taking sildenafil are usually mild and temporary.

The most common side effects of Sildenafil are: Headache, flushing, indigestion, nasal congestion, dizziness, nausea, hot flushes, vision changes (such as having a blue colour tinge, or blurred vision).

Please read the patient information leaflet carefully for a full list of side effects and advice.

Cautions / how do I get the most out of the treatment?

Do not take more than one dose of sildenafil in a 24-hour period.

Sildenafil will only work if you are sexually aroused, so ensure you still engage in foreplay.

Do not drink large amounts of alcohol before you plan to take sildenafil. Drinking too much alcohol can reduce your ability to get an erection and this may prevent you from getting the maximum benefit from the tablets.

It is recommended that you do not drink grapefruit juice with sildenafil. This is because grapefruit juice can increase the amount of sildenafil in your bloodstream and this makes side-effects more likely.

If you feel the tablets are too strong for you, discuss this with the clinician as your dose may need to be reduced. Alternatively, if you do not get an erection after taking sildenafil, or if it does not last long enough for you to have sex, you should discuss this with your clinician - do not take more tablets than you have been told to.

You should not take sildenafil if you are using any other products or taking any other medicines that treat erectile dysfunction.

If you’ve had an erection lasting longer than 4 hours, it’s time to seek urgent help. Go to your local A&E immediately.

Who should not take Sildenafil?

Women or Men under 18.

Men for whom sexual activity may be inadvisable. These men should be referred to their doctor. This includes men:

  • whose doctor has advised that they are not fit enough for any physical and/or sexual activity.
  • who feel very breathless or experience chest pain with light or moderate physical activity, such as walking briskly for 20 minutes or climbing two flights of stairs.
  • who have had a recent (6 months) acute myocardial infarction (AMI) or stroke.

Men who have any other heart problems or are under a doctor’s care for any of the following:

  • Low blood pressure or uncontrolled high blood pressure.
  • Unstable angina (chest pain), irregular heartbeat or palpitations (arrhythmia).
  • A problem with one of the valves in the heart (valvular heart disease).
  • A problem where the heart muscle becomes inflamed and does not work as well as it should (cardiomyopathy).
  • Heart problems causing blood flow issues (e.g. left ventricular outflow obstruction, aortic narrowing) or severe cardiac failure.

Men with:

  • Hypersensitivity to the active substance or to any of the excipients.
  • Anatomical deformation of the penis (such as angulation, cavernosal fibrosis or Peyronie's disease).
  • Loss of vision in one eye because of non-arteritic anterior ischaemic optic neuropathy (NAION) or known hereditary degenerative retinal disorders such as retinitis pigmentosa.
  • Galactose intolerance, Lapp lactase deficiency or glucose-galactose malabsorption.
  • Previously diagnosed hepatic disease or severe renal impairment.
  • Any of the following: sickle cell anaemia, multiple myeloma or leukaemia.
  • Any bleeding issues (e.g. haemophilia) or that have active stomach ulcers.
  • Men without erectile dysfunction.

Men taking:

  • Nitrates (nicorandil or other nitric oxide donors e.g. glyceryl trinitrate, isosorbide mononitrate or isosorbide dinitrate) for chest pain.
  • ‘Poppers’ for recreational purposes (e.g. amyl nitrite), or any recreational stimulant drugs such as cocaine or mdma.
  • Riociguat or other guanylate cyclase stimulators for lung problems.
  • Ritonavir (for HIV infection).
  • CYP3A4 inhibitors, e.g. saquinavir (to treat HIV infection), cimetidine (a heartburn treatment), itraconazole or ketoconazole (to treat fungal infections), erythromycin or rifampicin (antibiotics) or diltiazem (for high blood pressure).
  • Alpha-blockers, such as alfuzosin, doxazosin or tamsulosin, which are medicines to treat urinary problems due to enlarged prostate (benign prostatic hyperplasia) or occasionally to treat high blood pressure.
What else do I need to read?

Please read the 'Patient Information Leaflet' supplied with your medication. This provides important information.