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A member asked:
How long or how many days does penicillin or antibiotics last in the body or blood stream after you stop taking them?
A doctor has provided 1 answer
Different for each: This varies widely, from a few hours (e.g. most oral penicillins, like amoxicillin) to around 10 days (e.g. azithromycin). The quinolones (e.g. ciprofloxacin) and tetracyclines (e.g. doxycycline) typically are gone in 2-3 days.
Answered 8/29/2016
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