iXiR Dropers Spot On Cat - 3 Doses Kills Fleats, Flea eggs & Larvae, Ticks, Chewing Lice Fast-acting Long-lasting Waterproof Kills ticks, including those that may transmit Lyme disease . For use ONLY on Cats Composition- Fipronil 6% Basil oil Neem oil Essential oil carrier up to 3 ml Indication - B STOP DROPPERS provides fast, effective and convenient treatment and control of fleas, ticks and chewing lice for cats. -Stops and prevents Infestations. -Kills adult fleas, flea eggs, and flea larvae. -Prevents all flea stages (eggs, larvae, pupae) from developing -Kills fleas which may cause flea allergy dermatitis. -Kills all stages of deer ticks (which may carry Lyme disease), brown cat ticks. American cat ticks, and lone star ticks.