Isoniazid pyruvate is a metabolite of isoniazid. Isoniazid (Laniazid, Nydrazid), also known as isonicotinylhydrazine (INH), is an organic compound that is the first-line medication in prevention and treatment of tuberculosis. It has been claimed that isoniazone pyruvate causes less excretion of pyridoxine than isoniazid and might therefore be less likely to cause peripheral neuritis.