I haven't read the responses here, and I'm not going to get into my own experiences with this too much really but it was pretty bad but I've managed to combat it pretty effectively without drugs. For drugs, the option I would have chosen was wellbutrin, though happily it never came to that. Of course, never having taken it personally, I obviously can't comment on its effectiveness.
I took up meditation, yoga, and excercise. Fotunately, I didn't have to worry about becoming to obsessive about excercise because I'm incredibly lazy...but I can think of worse things to be obsessive about. I still catch myself counting things sometimes, but not even every day. I do think it makes me better at my job. Every supervisor I've ever had has commended me for my attention to detail, haha.
Nexa
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“It has always been the prerogative of children and half-wits to point out that the emperor has no clothes. But a half-wit remains a half-wit, and the emperor remains an emperor.â€
― Neil Gaiman, The Sandman, Vol. 9: The Kindly Ones