Credelio (lotilaner) is a chewable tablet that kills ticks and fleas fast and lasts all month long to protect the dog you love. Credelio kills adult fleas, treats and prevents flea infestations (Ctenocephalides felis), and treats and controls tick infestations [Amblyomma americanum (lone star tick), Dermacentor variabilis (American dog tick), Ixodes scapularis (black-legged tick) and Rhipicephalus sanguineus (brown dog tick)] for one month in puppies and dogs 8 weeks or older and 4.4 pounds or more.