When I was doing a report on Fentanyl years ago I came across a journal article describing a mortuary worker who had ODed after stealing Fentanyl patches off deceased cancer patients and extracting residual drug from them. Yuck. That was '99 or so that I read that.
I've got to second the suggested that KIW take an SSRI (aka Prozac, Paxil, Celexa, many others). I've got an utterly boring sex life but three different times over the years I've tried an SSRI for mild depression and every time it just destroyed my sex drive within days and I had to stop. I'd rather be mildly depressed (or actually take a non-SSRI anti-depressant which is what I do) than have no sex drive (or ability to orgasm) at all.
So KIW could get on Prozac or whatever pretty easily (tell the doc you're bothered by an overstrong libido and want one that most damps sex drive) and that could really help.