Sildenafil strengths & dosages

Sildenafil is an erectile dysfunction (ED) medicine which can be used to help men, aged 18 and over, who struggle to get and maintain an erection hard enough for sex. If you haven’t heard of Sildenafil then you might have heard of Viagra, also known as the ‘blue pill’.  Sildenafil is the generic version of the branded Viagra, which means it contains the same active ingredient (sildenafil citrate) and works in the same way as Viagra. It also has similar side effects. 

Sildenafil is available through our Erectile Dysfunction Online Clinic as one of a number of medicines to help treat the symptoms of ED. You’ll only be offered treatment once you’ve completed an online consultation to check that a medicine is suitable for you. If you’ve never used our service before and it is suitable for you, you could be prescribed the 50mg Sildenafil starter strength (subject to availability and clinician approval). 

What Sildenafil dose works most effectively for you can depend on a number of factors such as your health and lifestyle choices, as well as the severity of your ED symptoms. The 50mg dose will usually be satisfactory for most men living with erectile dysfunction.


What strengths are available through the Boots Erectile Dysfunction Online Clinic? 

There are currently three different Sildenafil strengths available through the Boots Erectile Dysfunction Online Clinic: Sildenafil 25mg, Sildenafil 50mg and Sildenafil 100mg. All Sildenafil strengths available through the clinic are subject to suitability and clinician approval. Prices start from £10.00. 

Sildenafil 25mg

This is the lowest Sildenafil dosage we have available through our clinic. It’s sometimes considered for men who have certain medical conditions or people who take certain medication. Sildenafil 25mg will only be available to first time users of our online clinic if they have been previously prescribed Sildenafil 25mg by a GP or an online doctor. Sildenafil 25mg may also be suitable for people who experience side effects with the 50mg starter dose.

Sildenafil 50mg 

Sildenafil 50mg is the most commonly prescribed Sildenafil dosage, and is often the recommended starter dose for people new to the drug. In a clinical trial, 74 percent of men reported that sildenafil 50mg helped with their erections. If 50mg tablets don’t help you get an erection hard enough for sex, our clinicians may prescribe you the 100mg dose if suitable.

Sildenafil 100mg 

Sildenafil 100mg is the highest Sildenafil dosage available, and may be prescribed to people who can’t get an erection hard enough for sex when using the lower dose. The effects of the tablet will last for the same amount of time as the 25mg and 50mg Sildenafil tablets, but you may experience more side effects.


How often should I take my prescribed Sildenafil dosage? 

Sildenafil, no matter what strength you have been prescribed, should never be taken more than once a day. It’s important that you don’t exceed the Sildenafil dosage prescribed through our clinic or your GP, as doing this could be harmful to your health and won’t increase the effectiveness of the drug. Taking more than your prescribed Sildenafil dosage could result in an increase in side effects and their severity. 
If you take more than your prescribed Sildenafil dosage, contact your GP or call 111 immediately. 


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