isoniazid - oral
GENERIC NAME: ISONIAZID - ORAL (EYE-soe-NYE-a-zid)
WARNING: Isoniazid has rarely caused very serious (possibly fatal) liver disease. The risk of liver disease is increased in people who are 35 years and older, who use alcohol or illegal injection drugs, or who currently have long-term liver problems. Tell your doctor immediately if you develop symptoms of liver disease, including persistent nausea/vomiting, severe stomach/abdominal pain, unusual weakness/tiredness, dark urine, yellowing eyes/skin.
Your doctor should order liver function tests while you are taking this medication. Keep all medical and laboratory appointments.
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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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