FDA: Some Flea and Tick Medication Causes Seizures

The U.S. Food and Drug Administration is warning pet owners that some flea and tick medications can potentially cause “neurological adverse events” in dogs and cats. The warning applies to Bravecto, Nexgard, Simparica or Credelio. The FDA says officials closely monitor medications for the first three years after approval. If any reports of adverse effects arise within that time period, the agency then typically releases updated safety information.

Pet owners who want to report adverse effects or would like more information about the warning can contact:

Merck Animal Health (Bravecto): 800-224-5318

Elanco Animal Health (Credelio): 888-545-5973

Merial (Nexgard): 888-637-4251

Zoetis (Simparica): 888-963-8471

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