'Love hormone' controls sexual behaviour in mice

Journalists: Scientists found the love gene!

Scientists: That's not how it works at all! There is no love gene! A gene merely describes how and when to build particular proteins - e.g. hormones - which, together form complex processes in the organism which eventually result in ...

Journalists: Scientists found the love hormone!

Scientists: ...

So the "love hormone" side effects are:

> Oxytocin is a natural hormone that causes the uterus to contract. Common side effects include redness or irritation at the injection site, loss of appetite, nausea, vomiting, cramping, or stomach pain.

http://www.rxlist.com/pitocin-side-effects-drug-center.htm

While this article doesn't necessarily present anything new, I thought I'd chime in with some related information.

In males (at least), the hormone Testosterone is primarily responsible for sex drive (along with sufficiently low amounts of Estrogen). It's been studied quite extensively -- but webmd does a pretty good job of summarizing Testosterone's effect on libido in men: http://www.webmd.com/men/how-low-testosterone-can-affect-you...