Active substance: Isoniazid

Dosage: 300 mg

Price: €28.42 – €112.54

Tuberculosis is an infectious disease that requires long-term treatment with special anti-tuberculosis drugs. One of these drugs is Isoniazid, which is used as monotherapy and for combination treatment. You can buy Isoniazid at the lowest price from our online pharmacy. You can buy a wide range of medicines without prescription, with guaranteed high quality and fast delivery throughout United Kingdom.

What Isoniazid Is

Isoniazid is an antituberculosis medicine that is administered in monotherapy and in combination therapy. The main active ingredient is Isoniazid and each tablet contains 300 mg.


It is indicated for the treatment of tuberculosis in all its forms and locations, latent tuberculosis infection and tuberculosis prophylaxis in persons in contact with tuberculosis patients.

Dosage and administration

The daily dose and duration of treatment are determined on an individual basis. The tablets should be taken before a meal or after 30-40 minutes. The daily dose for adults and children from 4 years of age is calculated as 5 mg per 1 kg body weight per day or 10 mg/kg three times a week. The maximum daily dose for children is 500 mg and for adults 600 mg. Duration of therapy: active tuberculosis 6-8 months, prophylactic therapy 2-3 months.


Isoniazid therapy should not be prescribed in case of:

  • allergy to any of the components of the drug
  • epilepsy;
  • predisposition to epileptic seizures;
  • severe psychosis
  • poliomyelitis;
  • toxic hepatitis;
  • acute and chronic hepatic and renal failure
  • severe atherosclerosis
  • arterial hypertension
  • coronary artery disease;
  • hepatitis;
  • cirrhosis of the liver;
  • bronchial asthma;
  • psoriasis;
  • hypothyroidism.

Side effects

Side effects that may occur during treatment: nausea, vomiting, constipation, anorexia, acute pancreatitis, allergies, fever, skin itching, vasculitis, headache, dizziness, convulsions, optic neuritis, chest and cardiac pain, difficulty urinating, hepatitis, jaundice, gynaecomastia, rheumatoid syndrome, malaise, weakness, increased fatigue.