Written by Beth Hrusch
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Metronidazole for Use in Animals

This drug is a synthetic antibiotic and antiprotozoal, effective in treating bacterial and parasitic infections. In animals it is used against infections caused by Giardia and Trichomona, both protozoal parasites. It works by disrupting the DNA of the organism. Because of its rapid absorption and compatibility with other antibiotics, it is often the drug of choice for veterinarians treating these types of infections in animals.

Metronidazole for Dogs and Cats

In dogs and cats, this drug is especially effective in treating colitis, periodontal disease, tetanus, and diarrhea. In gel form it can be used for skin infections such as feline chin acne. It should be taken with food, as side effects related to the bad taste are common. These include excessive salivation, gagging, nausea and vomiting. In rare cases dogs and cats may experience diarrhea, depression and low white blood cell count.


Metronidazole should not be used in puppies and kittens, nor in pregnant animals as it may cause birth defects. Animals with kidney or liver disease should probably not be given this drug. Prolonged use can result in disorientation, tremors and seizures.

It is available in tablet, capsule or injectable form. A veterinarian should be consulted regarding the correct dosage for the animal being treated, as overdose can do permanent neurological damage. This drug is available through vet supply and wholesale pet supply.

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