Synergy Labs Flea and Tick Shampoo PRODUCT REVIEWS PAGE 1 OF 1 Options Available: 16oz. Shop Synergy Labs Flea and Tick Shampoo Rated 5 out of 5 by 1 reviewers. Rated 5 out of 5by KrisMacWorks Great!I have never had a flea and tick shampoo work as well this one does. Once I rubbed the shampoo in the fleas literally started falling off! 08/08/2014 Page 1 of 1 1