how long before flagyl gets out of your system
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.Source(s): http://www.medsafe.govt.nz/profs/Datashe...ow 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?