Brand: Nydrazid

Drug Type: Antibiotic

Form: Tablet

Age limit: 2 years and above

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When treating active tuberculosis (TB) infections, Isoniazid 300 mg Tablet is combined with additional drugs. It is utilized on its own to shield those who may be TB afflicted from developing active diseases (people with positive TB skin test). As an antibiotic, isoniazid prevents the development of bacteria. With this medication, only bacterial illnesses are treated. Viral infections will not be treated by it (such as the common cold, or flu). Any overused antibiotic may become ineffective against subsequent illnesses.


Administer Isoniazid 300 mg Tablet at least an hour or two after food. The doctor explains the dosing and administration instructions to the patient. One should not consume more than the healthcare professional has directed. It could be detrimental to health. 


The side effects of Isoniazid 300 mg Tablet manifest differently in individuals. They are mentioned below:

  1. Skin rash
  2. Mental changes
  3. Convulsions
  4. Blurred vision
  5. Loss of appetite
  6. Nausea
  7. Fatigue
  8. Hepatitis
  9. Unusual bruising
  10. Feet Numbness

If the side effects persist, visit the physician immediately to manage it. One may see adverse side effects in the case of drug interactions.


The dosing schedule depends on factors like the severity of disease and the patients response to the treatment. Adults and adolescents should take 300 milligrams (mg) daily to prevent tuberculosis recurrence (reactivation).

Children: Body weight determines the dosage. The typical dosage is 10 mg per kilogram (kg) of body weight, up to 300 mg once daily (4.5 mg per pound).

Adults and adolescents should take 300 mg once daily for tuberculosis treatment, or 15 mg per kg (6.8 mg per pound) of body weight, up to 900 mg, twice a week or three times a week, depending on your doctor’s recommendations.

Children: Body weight determines the dosage. Depending on the schedule your doctor determines for you, the typical dose is 10 to 20 mg per kg (4.5 to 9.1 mg per pound) of body weight, up to 300 mg, daily; or 20 to 40 mg per kg (9.1 to 18.2 mg per pound) of body weight, up to 900 mg, twice or three times a week.


  1. Refrain from taking this medication if one is allergic to the ingredients. 
  2. Adverse side effects of combining Isoniazid 300 mg Tablet with other medicines exist. Book a doctors appointment if this occurs. 
  3. Avoid alcohol intake while on this medicine course. One can never tell how it would react in the body, especially with this drug. It is because of the conditions that this medication treats.    
  4. Avoid taking more than the recommended amount. It is detrimental and dangerous to leave one to their devices.    
  5. This medicine poses fewer risks to toddlers who are breastfed. A mother needs to exercise caution. It has been researched and corroborated.   

These necessary precautions are taken for improved health.


Isoniazid 300 mg Tablet interacts with other medicines and can reduce the effectiveness of the medication taken. Doctor informs the patient about the drugs that should not be ingested with this medicine. 

Drugs that interact with the given medicine stated below:

  • Vitamin D3
  • Tylenol
  • Paracetamol
  • Lexapro
  • Humira
  • Cymbalta
  • Attapulgite
  • Doravirine
  • Kaolin
  • Ethanol
  • Ospemifene

Be aware of the drugs and their uses. Liver disease, Renal dysfunction, and Peripheral neuropathy interact with this medication. 


Active Ingredient Inactive Ingredients
Isoniazid Starch, Corn
Silicon dioxide
No. of Pills

60 Pills, 90 Pills, 120 Pills, 180 Pills, 270 Pills, 360 Pills

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