A member asked:

How long does it take for penicillin to start working for 4 year old?

A doctor has provided 1 answer

Few hours: Penicillin starts to work as long as it is absorped if given orally that is within few hours and keep working and peaks somewhere after 5 days, it is usually given for 10 days course but it starts to work a little earlier if given by intramuscular route and immidiately if given intravenously.

Answered 2/2/2016

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