Isoniazid-Darnitsa instructions:


Darnitsa Pharmaceutical Company, Kiev, Ukraine

Active substance Isoniazid

  • Isoniazid;
  • Excipients: potato starch, calcium stearate.

Isoniazid dosage forms

  • Tablets 0.3G No 10x5 in contour cell packs No. 1000, No. 1500, No. 2500 in containers
  • Solution for injection 10% to 5 ml in ampoules No. 10( in a bundle or in a box)

To whom Isoniazid is indicated

Treatment of all forms and localizations of active tuberculosisIn adults andOf children as a first-line agent The drug is most effective in acute processes

How to use Isoniazid

How to use and dose


Adults and children Isoniazid-Darnitsa in the form of tablets are prescribed in a daily dose of 5-15 mg / kg in 1-3 divided dosesThe daily dose is set individually depending on the nature and form of the disease, the degree of inactivation and tolerability of the drug to the patient. For the prevention of tuberculosis Isoniazid-Darnitsa in tablets taken intern

ally at 5-10 mg / kg per day in 1-2 divided doses. Take every day or 2-3 times a week. The duration of the preventive course is at least 2 months. The maximum single dose is 600 mg, the daily dose is 900 mg.

Solution for injection

Isoniazid-Darnitsa is used intravenously in the form of inhalations, intramuscularly, intracavernosally. Intravenously, Isoniazid-Darnitsa is administered for the treatment of advanced pulmonary tuberculosis, with massive bacterial release, concomitant diseases of the gastrointestinal tract, patients who shy away from ingestion, in case of ineffectiveness with this method of administration. Adults and adolescents enter for 0.01 to 0.015 g( 10-15 mg) per 1 kg of body weight per day( 10% solution) for 30-60 seconds, once a day. The course of treatment depends on the effectiveness of therapy and the tolerability of the drug - 30-150 injections. To prevent side effects with intravenous Isoniazid-Darnitsa, vitamin B6( pyridoxine) and glutamic acid are used. Pyridoxine is administered intramuscularly( 100-125 mg) 30 minutes after isoniazid-darnitsa or is prescribed by mouth( 60-100 mg) every 2 hours after intravenous Isoniazid-Darnitsa injections. Glutamic acid is taken in a daily dose of 1 to 1.5 g. With intravenous use of the drug, it is necessary to comply with bed rest for 1-1.5 hours.

Intramuscularly, adults and adolescents are administered as a 10% solution at 5-12 mg / kg inDay, once a day for 2-5 months. To alleviate the side effect with this method of administration in conjunction with the introduction of Isoniazid-Darnitsa, pyridoxine is administered at a dose of 60-100 mg( it can also be administered intramuscularly 30 minutes after isoniazid-darnitsa at a dose of 100-125 mg / kg).

Inhalation Isoniazid-Darnitsa is prescribed in 1-2 divided doses as a 10% solution. The daily dose is 0.005-0.01 g( 5-10 mg) per 1 kg of body weight. Inhalations are performed daily for 1-6 months.

Patients with fibrous-cavernous and cavernous forms of tuberculosis in case of bacterial excretion and in the preoperative period 10% solution of the drug in a daily dose of 10-15 mg / kg, once a day, are administered predominantly intracavernosed.

The maximum daily and course dose of the drug is determined depending on the nature and form of the disease, the degree of inactivation and individual tolerance of isoniazid.

Application features.

During treatment, it is necessary to have medical control, regular carrying out of functional hepatic tests and ophthalmological examination. In the first month of the survey, it is necessary to conduct at least 2 times, then at least 1 time per month.

Piridoxine( eg, Pyridoxine hydrochloride-Darnitsa, intramuscularly 2 ml of 5% solution per day), thiamine chloride( eg, Thiamine chloride-Darnitsa, intramuscularly 1 ml of 5% solution per day), glutamicAcid( inside 1-1, ml per day).

To prevent possible toxic effects of isoniazid on the liver, it is prescribed in combination with hepatoprotectors( eg, Darcil, Ursohol).

During treatment, use of alcoholic beverages should be avoided.

not recommended intake of the drug in the dose, the higher 10 mg / kg, pregnancy, pulmonary heart failure III degree hypertension II-III level, coronary heart disease, disseminated atherosclerosis, nervous system diseases, bronchial asthma, psoriasis, eczema phaseExacerbation, chronic renal failure, hepatitis in the acute phase, liver cirrhosis, hypothyroidism.

When breastfeeding, taking the medication should stop or stop feeding.

Side effects of Isoniazid

In doses that are recommended, Isoniazid-Darnitsa is generally well tolerated. Sometimes dizziness, headache, irritability, euphoria, sleep disturbance, paresthesia. Rarely arise peripheral neuritis, psychosis, increased frequency of seizures in epileptic patients, palpitations, chest pain, in the heart, the liver, allergic reaction( eosinophilia, itching, dermatitis, fever, etc.).Very rarely there are gynecomastia and menorrhagia, hepatitis.

Of course, side effects occur with a reduced dose or a temporary break in taking the drug. This

contraindicated Isoniazid

isoniazid-Darnitsya contraindicated, regardless of the route of administration of the drug intolerance, epilepsy and other diseases involving the tendency to convulsions, in the case of the previously transferred polio, disorders of the kidneys and the liver, atherosclerosis.

Interaction Isoniazid

Antacid agents reduce isoniazid absorption, so the interval between their intake should be at least 1 hour. Isoniazid potentiates effects( including toxic) of indirect anticoagulants, benzodiazepines, phenytoin, carbamazepine, theophylline, MAO inhibitors. Concomitant use of potentially hepatotoxic and neurotoxic agents, including alcohol, rifampicin, increases the risk of toxic hepatitis and neuropathy, with paracetamol increases the risk of hepatotoxic action.

To enhance the efficiency of Isoniazid-Darnitsya used in combination with other anti-inflammatory drugs( e.g., Rifampicin-Darnitsya, Ethambutol-Darnitsya, Pyrazinamide-Darnitsya) and a mixed infection - simultaneously with broad-spectrum antibiotics: fluoroquinolones( e.g. ofloxacin-Darnitsya, Ciprofloxacin-Darnitsa), sulfonamides( for example, Biseptrim), macrolides( for example, Clamed, Azicin, Roxilide), etc. Overdosing


case of overdose through 0.5-3 hours after ingestion can be nausea, vomiting, dizziness, blurred vision and slurred speech. Severe intoxication leads to respiratory depression, seizures and coma.

Treatment. Gastric lavage, activated charcoal, intravenously high doses of pyridoxine. Effective hemodialysis.