Ectoline spot on solution for medium dogs treatment of flea and tick infestations insecticidal efficacy against new infestations with adult fleas persists for up to 8 weeks the product has a persistent acaricidal efficacy for up to 4 weeks against ticks if ticks of some species are present when the product is applied all the ticks may not be killed within the first 48 hours but they may be killed within a week the product can be used as part of a treatment strategy for the control of flea