General Information on Isoniazid
An antibiotic, Isoniazid is indicated for the treatment of tuberculosis. This drug works by preventing the infection-causing bacteria from spreading within the body. You need a doctor’s prescription to buy Isoniazid.
Isoniazid is meant for oral administration only. It is available in form of oral tablets in strengths, Isoniazid 100 mg and Isoniazid 300 mg, and syrup that contains 50 mg of Isoniazid/teaspoon.
Side effects of Isoniazid
You should not buy Isoniazid if you have a known hypersensitivity to any of its ingredients. If you are using this drug for a first time and experience an allergic reaction after taking it, immediately report the symptoms to your doctor. Allergic reaction to Isoniazid, sometimes, can prove to be dangerous, especially if medical help is not sought straightaway. Common symptoms associated with allergic reaction are:
- Skin rashes and/or itching
- Hives
- Facial flushness
- Swelling of the lips, tongue, or throat
- Breathing problems, falling short of breath or wheezing
- Closing of the throat
Some of the common side effects of this drug may include the following:
- Abdominal pain
- Nausea or vomitting
- Loss of appetite
- Yellow eyes or skin
- Seizures
- Blurred vision
- Numbness or tingling sensation in the feet or hands
- Dark urine
- Fatigue or unusual weakness
During treatment if you experience any of these side effects, consult your doctor immediately. Isoniazid may also cause other side effects. Consult your doctor to know more about the potential risks associated with this drug.
The administration of Isoniazid in pregnant women should only be considered if the expected benefit to the mother is greater than any possible risk to the fetus.
The safety of Isoniazid in breastfeeding women is not known. The contents of this drug may enter breast milk and cause harm to infant. Consult your doctor before using Isoniazid if you are breastfeeding.
Dosage of Isoniazid
The recommended dosage in adults is Isoniazid 5mg per kg up to Isoniazid 300mg per day taken in a single dose or Isoniazid 15mg per kg up to Isoniazid 900mg per day, 2-3 times a week.
In addition to Isoniazid, your doctor is likely to recommend that you avoid certain foods and drinks (such as alcohol) during the course of your treatment. For best results, it is important that you take your medication exactly as prescribed and follow all instructions given by your doctor.
Interactions
Isoniazid is known to interact with various drugs. Names of some such drugs are:
- Warfarin
- Rifabutin or Rifampin
- Antifungal medicines such as itraconazole and ketoconazole
- Disulfiram
- Benzodiazepines such as lorazepam, temazepam, diazepam, alprazolam, and others
- Mephenytoin, phenytoin, and ethotoin
- Carbamazepine
- Cycloserine
- Ethionamide
- Theophylline
Other drugs may also interact with Isoniazid. You can easily prevent any unwanted drug interactions during your treatment with Isoniazid by informing your doctor, in advance, about all other drugs that you are using.
If you are using any drug that can interact with Isoniazid, your doctor may alter the dosage of that drug or Isoniazid. Your doctor may also ask you to stop using the drug that can interact with Isoniazid during the course of your treatment. While you are using Isoniazid, you must ensure that you consult your doctor before starting any new medication.
