It's every man's dream - a pill to make women want more sex. According to Boehringer Pharmaceuticals, that dream could be a reality in a few years, in the form of the strangely-named flibanserin. But is it the latest wonder-drug or just a glorified sleeping pill? Read on. Flibanserin was originally developed as an antidepressant, but in clinical trials against depression it reportedly failed to perform better than placebo. The standard for getting approved as an antidepressant is low, so this is quite an achievement. The BBC today described flibanserin as the "Female Viagra", which is rather confusing, because it's meant to increase sexual desire, which is one thing Viagra (sidenafil) doesn't do. The reason for the Female Viagra headline is that, as Professor John Thorp says: