Isoniazid

Generic Name: Isoniazid
Brand Name: Nydrazid  

Isoniazid is used for:

Treating or preventing tuberculosis (TB). If you are using Isoniazid to treat TB, it should always be used along with another medicine.

Isoniazid is an antibacterial. It works by killing TB organisms.

Do NOT use Isoniazid if:

• you are allergic to any ingredient in Isoniazid or have had severe side effects from isoniazid, such as drug fever, chills, or arthritis
• you have severe liver damage, active liver disease, or liver damage from previous use of Isoniazid
• you have a history of hepatitis caused by any medicine

Contact your doctor or health care provider right away if any of these apply to you.

Before using Isoniazid :

Some medical conditions may interact with Isoniazid . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

• if you are pregnant, planning to become pregnant, or are breast-feeding
• if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
• if you have allergies to medicines, foods, or other substances
• if you have diabetes, kidney problems, nerve problems (eg, neuropathy) or risk of nerve problems, HIV, or a history of liver problems
• if you have a history of alcohol or other substance abuse, have unsanitary injectable drug habits, or drink alcohol daily
• if you are older than 35 years old, you have recently given birth, or you have previously taken Isoniazid

Some MEDICINES MAY INTERACT with Isoniazid . Tell your health care provider if you are taking any other medicines, especially any of the following:

• Acetaminophen, anticoagulants (eg, warfarin), carbamazepine, hydantoins (eg, phenytoin), rifampin, theophylline, or valproic acid because the risk of their side effects may be increased by Isoniazid
• Ketoconazole because its effectiveness may be decreased by Isoniazid

This may not be a complete list of all interactions that may occur. Ask your health care provider if Isoniazid may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.