Petco Text Logo
Petco Pet Logo

My cat has giardia. Is one-dose secnidazole safe for treatment?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | 3 years and 7 months old | 8.82 lbs

My cat was diagnosed with giardias. It is very difficult to give my cat the medicine (twice a day for 10 days on both treatments we tried). I have read about a medicine called secnidazole that its 1 dose treatment (30mg per kilo) . I asked two vets about it but they told me they don't use that medicine here in Lima Peru. I found that medicine at the drugstore, I was wondering if it is safe for me to give her the medicine in the recommeded dosis. Thank you in avance for your time.

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on August 26th, 2018

It's not a medication that we use in the United States. I could not find a lot of information on its use in cats. In humans, side effects of this medication include abdominal pain, vomiting, and diarrhea. It is closely related to metronidazole, which is a medication that needs daily dosing. Overdoses of metronidazole can cause seizures and other neurologic symptoms. Since I haven't examined Kiki, it is illegal for me to give a dose of any medication for her. You might talk to your vet about other options for treating the giardia. Some medications can be compounded into other formulations, like a cat treat.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored