Paula Hall of Relate

A drug that failed tests as an antidepressant is being hailed as "Viagra for women" after surprising but not unpleasant side effects.

In three separate trials, the drug flibanserin did wonders for women's flagging sex drive despite doing nothing to lift mood.

The accidental discovery is akin to Viagra's - it was originally designed as a heart medicine but failed.

The US work was presented at a sexual medicine meeting in Lyon, France.

Lead researcher Professor John Thorp, of the University of North Carolina, told the European Society for Sexual Medicine: "Flibanserin was a poor antidepressant.

It's essentially a Viagra-like drug for women in that diminished desire or libido is the most common feminine sexual problem, like erectile dysfunction is in men