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 ...

“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.”

The method could be used to develop a blood test to identify inflammatory-bowel-disease patients most at risk.

The technology could give patients with advanced heart failure new hope, based on early trial results.

Some lecturers at Cardiff University have begun getting letters advising them their post is at risk.

England's chief medical officer warns of "bureaucratic thicket" if safeguards made too complicated.