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Why is this medication prescribed?
Isoniazid is used alone or with other drugs to treat tuberculosis (TB) and to prevent it in people who have had contact with tuberculosis bacteria. It eliminates only active (growing) bacteria. Since the bacteria may exist in a resting (nongrowing) state for long periods, therapy with isoniazid (and other antituberculosis drugs) must be continued for a long time (usually 6-12 months).
This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.
How should this medicine be used?
Isoniazid comes as a tablet and a syrup to take by mouth. It usually is taken once a day, on an empty stomach, 1 hour before or 2 hours after meals. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take isoniazid exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
What special precautions should I follow?
Before taking isoniazid,
What special dietary instructions should I follow?
Isoniazid may cause an upset stomach. Take isoniazid with food or milk.
What should I do if I forget a dose?
Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
What side effects can this medication cause?
Although side effects from isoniazid are not common, they can occur. Tell your doctor if any of these symptoms are severe or do not go away:
If you experience any of the following symptoms or those listed in the IMPORTANT WARNING section, call your doctor immediately:
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
In case of emergency/overdose
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
What other information should I know?
If you have diabetes, do not use Clinitest to test your urine for sugar because isoniazid can cause false results in this test.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT