Wurtman realized that lowered levels of serotonin, the brain chemical that Prozac raises, were also partly responsible for PMDD.

FORBES: Lilly Gives Away Prozac, Makes Money

But instead of simply marketing Prozac to women with PMDD, Lilly has decided to launch fluoxetine hydrochloride, the chemical formerly known only as Prozac, as a brand-new drug called Sarafem.

FORBES: Prozac To Fight PMS Under New Name