Isoniazid 300mg Tablet

Isoniazid (300mg)
🏭 Cadila Pharmaceuticals Ltd 📦 strip of 10 tablets 💊 Allopathy 📅 Updated: May 1, 2026
⚠️ Medical Safety Information
⚠️ Hepatotoxicity Risk 🤰 Pregnancy Category X/C/D

📋 Drug Information

Generic NameIsoniazid (300mg)
ManufacturerCadila Pharmaceuticals Ltd
Packagingstrip of 10 tablets
Therapeutic ClassANTI INFECTIVES
Action ClassMycolic acid inhibitors- INH
Habit Forming✓ No
Prescription Required✓ Yes (Schedule H Drug)

💊 What is Isoniazid 300mg Tablet used for?

Isoniazid 300mg Tablet is an antibiotic used for the treatment and prevention of tuberculosis (TB) and inactive (latent) TB (a serious infection caused by bacteria that affects the lungs and in certain cases other parts of the body). It works by killing the bacteria that cause tuberculosis.Isoniazid 300mg Tablet should be used in the dose and duration as advised by your doctor. It is to be taken on an empty stomach. Do not skip any doses and finish the full course of treatment even if you feel better. Stopping it early can result in treatment failure and increase the side effects too. Do not take a double dose to make up for a missed dose. Simply take the next dose as planned.Some common side effects of this medicine include tingling and numbness of feet and hand (peripheral neuropathy). Inform your doctor if you notice signs of jaundice, i.e., yellowing of eyes or skin, dark urine, stomach pain, or joint pain. You may also develop hepatitis (viral infection of the liver) or increased liver enzymes as side effects of this medicine. Please consult your doctor, as these side effects require medical attention and need dose modification.Your doctor may monitor your liver function while on treatment with this medicine. Avoid drinking alcohol as this may have additional adverse effects on the liver. Pregnant or breastfeeding women should consult their doctor before using this medicine.

💡 How to Take Isoniazid 300mg Tablet

Take with or without food as directed. Swallow whole, do not crush.

  • ✅ Take exactly as prescribed by your doctor
  • ✅ Do not exceed the recommended dose
  • ✅ Complete the full course of medication
  • ✅ Store at room temperature away from moisture

⚠️ Side Effects

Common and serious side effects may include:

  • Peripheral neuropathy (tingling and numbness of feet and hand)
  • Increased liver enzymes
  • Hepatitis (viral infection of liver)
  • Jaundice

Note: This is not a complete list. Consult your doctor if you experience any unusual symptoms.

🔄 Cheaper Substitutes (Same Salt)

Medicines with the same active ingredient Isoniazid (300mg) that may be more affordable:

📖 Patient Counseling

  • 🔹 Do not stop suddenly without consulting your doctor
  • 🔹 Inform your doctor about all other medications you're taking
  • 🔹 Avoid alcohol while taking this medication
  • 🔹 If you miss a dose, take it as soon as you remember. Skip if it's almost time for next dose.
  • 🔹 Seek immediate medical help if you experience severe allergic reactions