Health & WellbeingWhat flea and tick products are dangerous or toxic for dogs?
I occasionally see toxicity issues with some of the over-the-counter topical flea products like Hartz, Sergeant's, etc. - this is more commonly a problem in cats, but can sometimes be an issue with small dogs as well, especially if they've been dosed above their weight range. All of the prescription flea/tick medications currently on the market (Bravecto, Nexgard, Simparica, etc.) are quite safe and effective.
Updated on September 24th, 2025