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Isoniazid 100mg
Medically Reviewed by – Harry Ellison, PharmD
Last Updated on 8 July 2026

Isoniazid 100mg

$0.37 – $0.46
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
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Available Dosage
100mg
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Price
$46
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$46
Isoniazid 100mg CouponCoupon DescriptionCoupon Expiry Date
SUNNY28Summer Spectacular Sale2026-07-31
Categories: Anti TuberculosisTag: Pills

What is Generic for Isoniazid 100mg used for?

Isoniazid 100mg 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 100mg?

  • Disulfiram
  • Furazolidone
  • Isocarboxazid
  • Linezolid
  • Moclobemide
  • Phenylpropanolamine
  • Phenytoin
  • Selegiline
  • Tranylcypromine
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 100mg?

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 100mg?

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?

Note

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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