Methamphetamine is FDA-approved "as a short-term (i.e., a few weeks) adjunct in a regimen of weight reduction based on caloric restriction, for patients in whom obesity is refractory to alternative therapy, e.g., repeated diets, group programs, and other drugs."
I thought you were joking but you're not. Prescription meth is an actual thing...for ADHD...for children. I'd fire my doctor on the spot if he recommended such a thing.
Source: https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/00...
(Sarcasm, obviously. Do not do this.)