Therapy for Tuberculosis

Commonly used antituberculous drugs


The table-1 clearly illustrates the drugs, their dosages and adverse effects.

Treatment recommendations for the various forms of tuberculosis

Group-I (Prevention therapy) - 6 months of Isoniazid and Rifampicin.

The consensus statement of the IAP working group is Monotherapy has no

place except in BCG adenitis (6H).

1. Group 1 (Prevention therapy) _ 6HR

a) Asymptomatic Mantoux positive < 3 years

b) Asymptomatic Mantoux positive < 5 years with Grades III, IV PEM

Asymptomatic Mantoux +ve implies that the

patient has no tuberculous lesion and only a tuberculin positivity.

c) Recent converter to Mantoux +ve without signs (Healed lesion: Normal CXR/Calcification/Fibrosis)

d) Children < 3 years of age with history of contact

e) Children < 5 years of age with history of contact with PRIM III & IV

2. Group 2 _ 2 HRZ/4HR

a) Primary complex (Lungs)

b) Symptomatic mantoux +ve < 3 years without localization

c) Symptomatic mantoux +ve < 5 years without localization

with PEM Gr III, IV

d) Isolated lymphadenitis

e) Pleural effusion

3. Group 3 _ 2HRZE/4 HR(extend HR to 7 months if there is no improvement)

a) Progressive pulmonary disease

b) Multiple tuberculous lymphadenitis.

4. Group 4 _ 2HRZE/7HR

a) Miliary / Disseminated TB

b) Bronchopneumonia / cavity

c) Abdominal, pericardial, genitourinary disease, osteoarticular

5.Group 5 _ 2HRZE / 10 HRE

Neurotuberculosis

Special situations:

I. Baby born to mother with tuberculosis (Diagnosed in 3rd Trimester)

  • To continue breast feeding
  • BCG must be given
  • If chest x-ray is normal, to give 6 HR
  • If chest x-ray is abnormal, to give 2HRZ/
  • 4HR.

II. Congenital tuberculosis - 2HRZ/7HR

Table-1

Sl. No. Name of drug Daily dosage Main adverse effects (mg/kg/d)

01 Isoniazid (H)+ 5 Hepato toxicity

02 Rifampicin ® 10 Hepato toxicity

03 Pyrazinamide (Z) 30 Hepato toxicity

04 Ethambutol (E) 15 Visual disturbance

05 Streptomycin (S) 15 Ototoxicity, Nephro

Toxicity

1. + Newer < 5mg/kg; to be rounded off to the closest higher value

2. All drugs should be administered in a single daily dose on empty stomach

3. Drug is safe, if used in recommended dosage schedule.

4. Vit B6 is not necessary in children on INH.





Comments

KrishnanS, India

Very simple, informative and good coverage of the topic.
Dr S krishnan
Apollo-Hyderabad