Side Effects of Spot-On Frontline Flea & Tick

You love your pet and want to keep it safe from fleas and ticks however; using a flea and tick-killing compound on your animal can have serious side effects. To protect your pet, it's vital that you immediately recognize the warning signs of an allergic reaction to the pesticide fipronil, which is, the active ingredient used in Frontline Flea &Tick. Although many side effects are mild, if your pet is young or frail, fipronil could be deadly.

  1. Overdoses

    • It's critical to know your pet's exact weight so you can apply the correct dosage of the Frontline flea and tick product. A pet's overdose on this product can result in loose stools, vomiting, tremors, seizures or even death--especially if the pet is very young. If your pet develops any of these symptoms after you have administered this product to it, or if you think you may have given your pet too much of this product, contact your veterinarian as soon as possible.

    Skin Reactions

    • Watch your pet's skin after your apply the Frontline product. If its skin turns red, becomes swollen or inflamed, or develops a rash or hives, your pet is likely having an allergic reaction to the flea and tick product, and a veterinarian should be contacted immediately.

    Fur Changes

    • Over time, possible hair loss or brittle thinning of your pet's fur may happen in the area where the product is applied. Your pet may be sensitive to the product, so stop further use of the product and consult your veterinarian for other flea and tick options.