Frontline Tritak for Cats is a monthly application for complete control of fleas, ticks and chewing lice. TriTak will kill fleas for up to six weeks and flea eggs and flea larvae for up to four months. Apply monthly if your pet is at high risk for flea infestation or in a highly infested area. Apply monthly to control ticks and chewing lice. Tritak will remain effective even after bathing, water immersion or exposure to sunlight. Do not reapply for 30 days.