How long does Flagyl (Metronidazole antibiotic) take to be out of your system?

Question

How long does one Flagyl (Metronidazole) pill take to be out of your system? I am taking 3 a day, so does that mean 8 hours?

Answer 1

Yes, if you are told to take 3 tablets a day, ideally take it every 8 hours with food.

It takes 5.5 half lives for a drug to be out of your system. The elimination half-life of metronidazole is 7-8 hours, therefore it would take 44 hours (5.5 x 8 hours) or approximately 2 days before metronidazole is out of your system. So alcohol should be avoided during and for 48 hours after stopping therapy.