Generic name: isoniazid [ eye-so-NYE-a-zid ]
Brand name: Nydrazid
Dosage forms: oral syrup (50 mg/5 mL); oral tablet (100 mg; 300 mg)
Drug class:Hydrazide derivatives
What is isoniazid?
Isoniazid is an antibiotic that fights bacteria.
Isoniazid is used to treat and to prevent tuberculosis (TB). You may need to take other TB medicines in combination with isoniazid.
When treating active TB, isoniazid must be used with other TB medicines. Tuberculosis can become resistant to treatment if isoniazid is used alone. Take all your medicines as prescribed by your doctor.
Isoniazid may also be used for purposes not listed in this medication guide.
Warnings
You should not use isoniazid if you have active liver disease, or if you have taken isoniazid in the past and it caused liver problems, fever, chills, joint pain, or severe allergic reaction.
Serious and sometimes fatal liver problems may occur during treatment with isoniazid or after you stop taking this medicine, especially if you are between the ages of 35 and 65. Your liver function may need to be checked every month while you are taking this medicine.
Call your doctor right away if you have:nausea, upper stomach pain, loss of appetite, and feeling weak or tired.
Avoid drinking alcohol. It may increase your risk of liver damage while you are taking isoniazid.
Before taking this medicine
You should not use isoniazid if you are allergic to it, or if you have:
active liver disease;
a history of severe...
