Plant-based repellent and preventive - no pesticide - no sulfate. The alzoo™ flea & tick shampoo utilizes plant-based active ingredients to effectively repels fleas, ticks and mosquitoes helping reduce external parasite infestation. Protection begins from first application. Sustainable, safe & powerful. Proven safe and effective when used as directed. Contains alep soap, based on olive oil and laurel oil. Sulfate & paraben free. Cruelty free, made in the usa using recyclable packaging. Durable & easy to apply. Can be used once a week. Combinable. If your dog currently has fleas, use with alz