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Updated on September 23rd, 2025
Pet's info: Cat | Mixed Breed | Male | neutered | 5 years and 3 months old | 13 lbs
My cat (6.8 kg) has diarrhea, and the vet prescribed 1/2 Flagyl 250 every 12h (no specific diagnostic was made). It's been very hard to follow this protocol because the cat is very stubborn when taking pills (spits them and panics) and the only person in the house who can do it is me. However, due to my work shifts, I can only give him one of the doses. I read online that this dosage (1/2 pill) can be given just once daily and it's still effective for GI upset, but wanted to confirm this.Thanks!
2 Answers

Answered By Dr. Paula Simons
Veterinarian
Published on September 21st, 2021
Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS
Veterinarian
Published on December 19th, 2018
Flagyl (metronidazole) is safe and effective if given twice daily at intervals of 12 hours not exceeding dosage of 15mg/kg. Otherwise it can become toxic or ineffective. A bland diet (boiled white fish and rice) could be useful as well to solidify feces.
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