Many medicines have multiple uses. For decades I took a "seizure drug" to treat migraines and it worked great. I later found out it is also used to treat bipolar disorder. And I know there's one anti-depressant that is also used to help people stop smoking. Hell, aspirin became so commonly used for heart disease that now Bayer is running ads to remind us that it works as a pain reliever too.

And don't worry about your doctor's feelings. Find one who can help you.