Question: what is the difference between frontline plus and frontline tritak?
Answer: Both use fipronil and (s) methoprene to kill and control fleas and ticks. Frontline Gold uses pyriproxyfen in addition as an insect growth inhibitor. Frontline Tritak uses Cyphenothrin which is another pesticide that helps with species of fleas that have developed a resistance to fipronil and (s) methoprene alone.