Sildenafil (non-branded Viagra) is a medication which you can take regularly. It is safe to take every day, starting at 25mg or 50mg per dose with the option to go up to a 100mg dose for those who need it. If you have no problematic pre-existing health issues and you’re not taking other ED medications at the same time, you can take Sildenafil several days in a row. If you have the time and energy, that is!

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Our complete guide to fixing erectile dysfunction - so you have all the options.

Geoffrey Hackett, Professor in Mens Health and author of the The British Society for Sexual Medicine Erectile Dysfunction guidelines gives his expert view of the causes and consequences of erectile dysfunction.

Geoffrey Hackett,Professor in Mens Health and author of The British Society for Sexual Medicine Erectile Dysfunction guidelines, on the best treatments for erectile dysfunction.