Bevedo dog flea repellent will start to take effect about two hours after taking the medicine. It can effectively kill most of the fleas on the body surface in 4 to 8 hours, and can effectively kill most of the fleas on the body surface in 8 to 24 hours. Ticks, the effect of the medicine lasts for three months. Bayvet is a common anthelmintic drug that is highly palatable and can be eaten directly by dogs. It is used to treat skin diseases caused by fleas and ticks.