Here's what rhymes with fenfluramine.

Consider these alternatives

phen / then ibuprofen / chosen suppressant / present zidovudine / seen fen / then phenylpropanolamine / mean glucosamine / mean rifampicin / horizon progestin / testing chondroitin / avoiding gabapentin / depending antidepressant / present hydralazine / seen ciprofloxacin / having didanosine / seen aspartame / same azithromycin / rising lamivudine / seen