Tropiclean Natural Flea & Tick Maximum Strength Shampoo Our Natural Flea and Tick Maximum Strength shampoo contains NO PYRETHRIN OR PERMETHRIN, with 5 EPA APPROVED Natural Essential Oils - Clove Oil, Lemongrass Oil, Cedarwood Oil, Cinnamon Oil and Sesame Seed Oil - for a pleasant citrus aroma The combination of NATURAL ESSENTIAL OILS helps to effectively REPEL fleas, ticks, larvae and eggs for up to 7 days when applied to dogs and puppies 12 weeks or older Recommended for use on DOGS ONLY SAFE enough for routine baths