Frontline Plus Flea and Tick Control provides fast, effective and convenient treatment and control of fleas and chewing lice for dogs weighing between 23 lbs and 44 lbs. This fast-acting medication also kills ticks, including those that may transmit Lyme disease. The medium-sized dog flea and tick control can be safely used on dogs and puppies. Give man"s best friend a break from harmful pests all year long. This convenient package of Dog Flea and Tick Prevention contains enough medication for three months.