Generic name: isoniazid (oral route, intramuscular route) [ eye-soe-NYE-a-zid ]
Drug class:Hydrazide derivatives
Medically reviewed by Drugs.com. Last updated on Mar 29, 2022.
Severe and sometimes fatal hepatitis has been reported with isoniazid therapy and may occur even after many months of treatment. The risk for hepatitis increases with advancing age, concomitant alcohol use, chronic liver disease, and injection drug use. Patients given isoniazid should be carefully monitored and interviewed at monthly intervals. For persons 35 and older, in addition to monthly symptom reviews, hepatic enzymes (specifically, AST and ALT (formerly SGOT and SGPT, respectively) should be measured prior to starting isoniazid therapy and periodically throughout treatment. An increased risk of fatal hepatitis associated with isoniazid has been reported in women, particularly black and Hispanic women. The risk may also be increased during the post partum period. More careful monitoring should be considered in these groups, possibly including more frequent laboratory monitoring .
Oral route(Tablet;Syrup)Severe and sometimes fatal hepatitis has been reported with isoniazid therapy and may occur even after many months of treatment. The risk for hepatitis increases with advancing age, concomitant alcohol use, chronic liver disease, and injection drug use. Patients given isoniazid should be carefully monitored and interviewed at monthly intervals. For persons 35 and older, in addition to monthly symptom reviews, hepatic enzymes (specifically, AST and ALT (formerly SGOT and SGPT, respectively) should be measured prior to starting isoniazid therapy and periodically throughout treatment. An increased risk of fatal hepatitis associated with isoniazid has been reported in women, particularly black and Hispanic women. The risk may also be increased during the post partum period. More careful monitoring should be considered in these groups, possibly including more frequent laboratory monitoring .
Commonly used brand name(s)
In the U.S.
- Nydrazid
In Canada
- Pms-Isoniazid
Available Dosage Forms:
- Tablet
- Soluti