“I take 20 mg Cialis pill and it works as expected but after sexual intercourse I sometimes feel muscle pain in the back and fatigue. I do not know if this is because I work like a stud or it is a side effect. Anyway I am lucky that I gave it a try.”

I have tried Viagra and Cialis before and must say that Levitra causes less side effects though. I had terrible headache with Viagra which made sex impossible sometimes. With Levitra I forgot about it. I would recommend it to anybody who has similar problems ...

The error - affecting England and Wales - raises concerns about the impact on the government's approach to drug deaths.

Families impacted have criticised the review, calling it "not fit for purpose".

Lauren Caulfield was cared for at NHS hospitals in Leeds and Bradford before her daughter's death.

Interest in the drugs has risen but patients face a "postcode lottery" when trying to access them.