You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following anti-tubercular drug is least hepatotoxic? and explain in detail?
Ethambutol among the given options is the least hepatotoxic antitubercular drug. Ethambutol side-effect includes Dose dependent adverse effect Red green colour blindness (optic neuritis) which is initially reversible but later becomes irreversible. Therefore it is avoided in children < 6yr.