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Sildenafil (generic Viagra®)

Erectile dysfunction treatment

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4,204 reviews
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Sildenafil 50mg
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£0.00

 a tablet
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  • check_circle_filledMedically equivalent to Viagra®
  • check_circle_filledResults in 30-60 minutes
  • check_circle_filledEffects can last for up to 4 hours

Sildenafil information

Sildenafil is the generic version of the Viagra®, the most well known treatment for erectile dysfunction (ED).
Sildenafil is an effective, modern medicine used to treat erectile dysfunction (ED). When you take Sildenafil you may be able to:
  • Improve your ability to get and maintain an erection
  • Be more confident in your ability to get and maintain an erection
  • Be satisfied with the hardness of your erections
Sildenafil is effective at treating erectile dysfunction in the majority of men (at least 80% of men). It may have less of an effect with ED caused by psychological factors, and may not work if taken alongside a heavy meal or other drugs. If you aren’t getting the results you want please contact us.
Sildenafil is the active ingredient in Viagra®, and it’s also available as a generic, unbranded tablet. Both treatments are medically identical, but Viagra® costs more because of the premium brand name.
Sildenafil can last up to 4 hours, with peak effects in 2 hours. This will depend on factors including your dosage and your body’s metabolism.
Take one pill about an hour before you plan to have sex. Swallow the tablet whole with water. It’s important to take it without food, as the fat in your meal can make it less effective. You should also avoid drinking too much alcohol, as this can counteract the benefits. If you take any other medications, check with your GP before taking sildenafil to make sure they don’t interact with your pill.
Sildenafil is available in three doses: 50mg, 25mg and 100mg.
50mg
The starting dose usually recommended for men taking Sildenafil for the first time.
25mg
This is the recommended dose if you found 50mg effective, but experienced some side effects. It may also be prescribed if you’re over 65.
100mg
A high-strength dose used if you find 50mg isn’t effective enough, or your erection lasts less than 4 hours
The most common side effects of Sildenafil are: headaches, muscle aches, back pain, flushing and indigestion. In most cases, these settle after an hour. Please speak with your GP or pharmacist if you experience any side effects for a prolonged period of time.
Always read the patient information leaflet before starting treatment.View patient information leaflet

troubleshootSildenafil facts

  • Time to feel the effect
    30–60 mins
  • Effect lasts for
    Up to 4 hours
  • Available strengths
    25mg, 50mg, 100mg
  • Active ingredient
    Sildenafil citrate
  • Branded equivalent

How it works

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  • Royal Mail 1st Class£2.90
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  • Post Office Collection£3.95
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    Cost calculated at checkout
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Backed by our experienced UK-based medical team

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Dr Catriona Maybury

Medical Director | MBChB, MRCP, PhD

GMC: 6130975

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Declan Lismore

Superintendent Pharmacist | MPharm, MRPharmS, MPSI, PGDip

GPhC: 2073498

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Dr Paul Davis

UK Medical Operations Lead | BSc MB BS DCH MRCGP

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Dr Safia Hussain

GP Lead | MBBS, BSc, MRCGP, DRCOG, PGDip Clinical Dermatology

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Authored by Dr Clare Morrison. Last reviewed 01 February 2024 by Liyya Patel and Siobhan Titre.