Erectile Dysfunction

Images for illustrative purposes only

  • Sildenafil
  • Sildenafil
  • Sildenafil


Erectile Dysfunction
  • Medication features

    Sildenafil is a medicine used to treat erectile dysfunction. It is taken as a single dose approximately 30-60 minutes before sexual activity. It dilates the blood vessels in the penis to help a man achieve an erection.

    • Helps achieve an erection
    • Works within 30-60 minutes
    • Generic version of Viagra


NOTE: After selecting this product, you will need to complete a short assessment, so we can make sure this medication is suitable for you. Pricing is provided as a reference only. The final decision on issuing this medication remains with our GP / Pharmacist.

Sildenafil, sold under the brand name of Viagra, is a drug used to help increase the flow of blood to the penis in men who have difficulty getting, or maintaining an erection, following sexual arousal.


  • How long do Sildenafil tablets take to work? How long will it last?

    Sildenafil starts to work in around 30 minutes; however, it can produce an effect anywhere between 20 to 60 minutes after being taken.

    The time it takes to work and produce the desired effects can be influenced by other factors such as food and alcohol. Consuming Sildenafil with a high-fat meal or a high amount of alcohol will delay how long it takes for Sildenafil to work and may be less effective.

  • How regularly can I take Sildenafil tablets?

    Although Sildenafil can typically be taken as often as it is required, it is recommended not to take more than one erectile dysfunction medication treatment in 24 hours. It is also not recommended to take Sildenafil for more than four days a week.

  • What happens if Sildenafil doesn’t work?

    In some cases, it can take many different attempts of using Sildenafil before it is effective. If Sildenafil does not initially work, it is recommended to take it on eight separate occasions before increasing the strength or trying an alternative erectile dysfunction treatment. Alternative erectile dysfunction treatments include Tadalafil (Cialis), Vardenafil and Levitra.

  • Can I take Sildenafil tablets if I have heart problems?

    Sildenafil should always be used in caution in men with heart problems. Sildenafil can put the heart under increased strain by causing the blood vessels that supply the heart to widen, which results in increased blood flow into the heart.

    Whether Sildenafil is suitable or not will depend on a number of individual circumstances and your symptoms as well as their severity. Speak to one of our experts if this is the case.

Side Effects

There is always a risk of side effects with all medications. Some of these can be quite mild and can subside over time. Others are more serious and should be reported to your GP right away if you experience any side effects. Please contact a member of our team if you are concerned about any potential side effects that may occur when taking Sildenafil.

Common side effects may include:

  • Nosebleeds
  • Dizziness
  • Nausea
  • Flushing
  • Headaches
  • Runny/stuffed nose
  • Red and/or warm skin
  • Diarrhoea
  • Muscle pain or back pain

The side effects listed below are of a serious nature; you should stop taking Sildenafil, and report these to your GP immediately.

  • Sudden vision loss in both eyes or one eye. Sudden vision loss in both eyes or one eye can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy.
  • An erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, get medical help immediately. Priapism can cause permanent damage to your penis.
  • Sudden hearing decrease or hearing loss. Some men may also have ringing in their ears (tinnitus) or dizziness.


Info Leaflet

Before taking any medications, regardless of whether they are over the counter or prescription only, it is essential always to read the patient information leaflet


Patient Information Leaflet