<prompt> What is the dose of Isoniazid to be safely used in children?5 mgkg10-20 mgkg15-25 mgkg20-40 mgkg  <response>: Dose of Isoniazid in children is 10-20mgkg when given daily. Maximum dose is 300mgd. When given twice or thrice, weekly dose is 20-40mgkg maximum of 900mg. Dose of rifampicin in children: 10-20mgkg max 600mg Dose of pyrazinamide: 15 - 30mgkg max 2g Dose of ethambutol: 15 - 25mgkg max 1.5g Dose of streptomycin: 20 - 40mgkg max 1g Ref: Oxford Textbook of Medicine: Infection edited by David Warrell, page 441 