Isoniazid has 2 different meanings across 1 category:
Noun
antibacterial drug (trade name Nydrazid) used to treat tuberculosis
A synthetic crystalline compound C₆H₇N₃O (trademarks Hydra, Hyzyd, Isovit, Laniazid, Nydrazid, Rimifon, Stanozide) used as a bacteriostatic medication in the prevention and treatment of tuberculosis.