If you are familiar with Frontline Plus, 2 active ingredients in it are fipronil and (S)-methoprene. You see the same ingredients here with Frontline Gold with an added IGR (Insect Growth Regulator) pyriproxyfen. So one would see this as Frontline Plus and extra egg killing ingredients. This is what the veterinary clinics sell today.
FRONTLINE Gold has a triple action formula. Its 3 secret weapons: fipronil and (S)-methoprene and pyriproxyfen make it relentless at killing fleas, flea eggs and larvae, as well as ticks. And the protection doesn’t quit all month.
CALIFORNIA PROPOSITION 65 WARNING: This product contains chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. (California law requires this warning to be given to customers in the state of California) For more information go to http://www.P65Warnings.ca.gov.
For use ONLY on Cats
Keep out of reach of children. Do not apply in dogs. Harmful if swallowed. Wash hands thoroughly after handling.