Side effects are uncommon with NexGard products. Your cat may experience some irritation, redness, or hair changes at the application site of the topical product. This should go away within a ...

Nexgard says it’s become the number one selling dog flea and tick drug in the U.S. But the troubling side effects of these drugs are becoming more widespread.

Seizures were at the top of the list, with documents showing 1,315 seizures from Nexgard in the five years since the FDA approved it as safe and effective for most dogs.

Nexgard said it’s become the number one selling dog flea and tick drug in the U.S. But the troubling side effects of these drugs are becoming more widespread.

Nexgard said it’s become the number one selling dog flea and tick drug in the U.S. But the troubling side effects of these drugs are becoming more widespread.