FDA alert: Flea products linked to seizures

Dog and Cat (Photo: kitty.green66 / Flickr / CC BY-SA 2.0 / MGN)

The U.S. Food and Drug Administration (FDA) is warning pet owners about neurologic reactions linked to certain flea and tick treatments.

The FDA says some pets treated with Bravecto, Nexgard or Simparica have suffered adverse effects such as muscle tremors, seizures, and ataxia.

The National Ataxia Foundation defines the condition as "loss of full control of bodily movements."

The drugs are all in the isoxazoline class. A fourth medication in this class, Credelio, recently received FDA approval.

The FDA says the medications are safe for most animals. The agency is asking the manufacturers of these products to add new language to the labels warning of neurological side effects.

Bravecto is a topical treatment available for dogs and cats. Nexgard, Simparica, and Credelio are all chewable tablets approved only for dogs.

If your pet has a reaction or has had one in the past, the FDA encourages you to submit a report to the manufacturer.

Adverse reactions may also be reported directly to the FDA. Guidelines are available on the agency's website.

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