iXiR Dropers Spot On Dog - 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 DOGS. Composition Fipronil 6 % Basil oil Essential oil carrier up to 3 ml ONLY FOR DOGS I Indication B STOP DROPPERS provides fast, effective and convenient treatment and control of fleas, ticks and chewing lice for dogs and puppies. -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 dog ticks, American dog ticks, and lone star ticks