Credelio (Lotilaner) is a once a month chewable tablet that kills adult fleas and is indicated for the treatment of flea infestations (Ctenocephalides felis), and the treatment and control of tick infestations Amblyomma americanum (lone star tick), Dermacentor variabilis (American dog tick), Ixodes scapularis (black-legged tick) and Rhipicephalus sanguineus (brown dog tick)] in dogs and puppies 8 weeks of age and older and weighing 4.4 pounds or greater. Available in 1 month, 3 month or 6 month supplies depending on your dogs weight.