Fiprotec is a monthly topical treatment and prevention of fleas and ticks suitable for cats. It contains the active ingredient Fipronil 9.7% m/v. Fipronil will spread over the entire coat of the animal and kill all fleas within 24hours of application and ticks within 48 hours. Fiprotec has a residual effect which keeps killing fleas for up to 5 weeks and tick for up to 2 weeks.