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    You are here: Home > Pharmacy > I > Isoniazid
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    What is Generic for Isoniazid used for?

    Isoniazid is used to prevent and treat tuberculosis (TB). This medicine is an antibiotic that prevents the multiplication of tuberculosis bacteria in the body. This medicine may also be used to treat other conditions as determined by your doctor.

    What is the recommended dosage of Generic for Isoniazid?

    The dosage of Isoniazid prescribed to each patient will vary. Always follow your physician’s instructions and/or the directions on the prescription drug label.

    Take Isoniazid with a full glass of water.

    What if you miss a dose of Generic for Isoniazid?

    If your physician has instructed or directed you to take Isoniazid medication in a regular schedule and you have missed a dose of this medicine, take it as soon as you remember. However, if it is almost time for your next dose, then skip the missed dose and go back to your regular dosing schedule. Do not double the doses unless otherwise directed.

    What if you overdose on Generic for Isoniazid?

    Any medication taken in excess can have serious consequences. If you suspect an overdose of Isoniazid, seek medical attention immediately.

    What other drugs could interact with Generic for Isoniazid?

    It may be noted that drugs other than those listed above may also interact with Isoniazid.

    Usually drug interactions occur when it is taken with another drug or with food. Before you take a medication for a particular ailment, you should inform the health expert about intake of any other medications including non-prescription medications, over-the-counter medicines that may increase the effect of Isoniazid, and dietary supplements like vitamins, minerals and herbal, so that the doctor can warn you of any possible drug interactions.

    Isoniazid can interact with other MAO inhibitors and aluminum-containing antacids.

    Do let your doctor know if you smoke, consume alcohol or caffeinated drinks, or use illegal drugs as these may interfere with the action of your medication. Make sure to inform your doctor of any medical conditions you may have, or any family history of medical problems. Do not start or stop using any medicine without consulting your doctor.

    What are the side effects of Generic for Isoniazid?

    Like other medicines, Isoniazid can cause some side effects. If they do occur, the side effects of Isoniazid are most likely to be minor and temporary. However, some may be serious and may require the individual to inform the doctor or visit the nearest hospital immediately.

    It is pertinent to note that side effects of Isoniazid cannot be anticipated. If any side effects of Isoniazid develop or change in intensity, the doctor should be informed as soon as possible.

    Isoniazid can cause side effects such as diarrhea, heartburn, nausea, dizziness, and vision problems. This is not a complete list of all side effects. Do concur with your doctor and follow his directions completely when you are taking Isoniazid.

    What are the questions to ask your doctor before taking Generic for Isoniazid?

    Is it possible for me to take Isoniazid with other drugs?
    Should certain beverages, foods and other products be avoided when I take Isoniazid?
    What are the possible drug interactions of Isoniazid?
    How will Isoniazid work in my body?
    How should Isoniazid be taken?
    How to reduce the risk of Isoniazid drug interactions and side effects?


    The health and medical information provided here is intended to supplement and not substitute for the expertise and judgment of your physician, pharmacists or other health care professional. It should not be understood to indicate that the use of Isoniazid is safe, appropriate or effective for you. Always consult your health care professional before using this, or any other, drug.


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    Ask or Reply Questions
    Posted By... IDMRx User | 2011-05-02
    What is your suggested amount of medicines to be taken so i may purchase enough. Reply
    Replied by Pharmacist @ IDM
    Hi, Recommended dosage for rifampin-isoniazid-ethambutol-pyrazinamide is; Adult (average of 50 kg body weightt) 3 tablets/day. Patients weighing >70 kg 5 tab; 55-70 kg 4 tab; 38-54 kg 3 tab; 30-37 kg 2 tab. All doses should be taken once daily for 4 month. But the dosage of Rifampin–Isoniazid–Ethambutol–Pyrazinamide prescribed to each patient will vary. Always follow your physician's instructions and/or the directions on the prescription drug label since your physician will prescribe you the exact dosage based on your health conditions.
    Posted By... IDMRx User | 2010-10-19
    I have got TB and taking RIFAMPIN-ISONIAZID-ETHAMBUTOL. Now I have infection in my eardrum, is this caused by the TB? One more thing, I need to take co-amoxiclav to treat the ear problem, will it interact with the TB drug? Thanks Reply
    Replied by Pharmacist @ IDM
    Hi Josh, As per your statement, already you are taking RIFAMPIN-ISONIAZID-ETHAMBUTOL which is used to treat TB caused by bacterial infections, but now you want to take Amoxiclav. So in this condition I would suggest you to consult your physician regarding this, since he only knows about the severity of your body conditions.
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