Nexgard Combo for Cats NexGard Combo is a surpassing version of the popular NexGard series by Boehringer Ingelheim. It is the only monthly spot-on treatment that protects cats against both internal and external parasites. Nexgard Combo offers the broadest spectrum of protection to cats by treating adult fleas, flea eggs, ticks, heartworms, hookworms, roundworms, lungworms, vesical worms and tapeworms. It also offers prevention from heartworms. This comprehensive spot-on treatment makes it easy and convenient for cat parents to save their cats from these harmful pests. Nexgard Combo is formulated using three key ingredients, including esafoxolaner, eprinomectin, and praziquantel. Esafoxolaner deals with the external parasites, whereas, eprinomectin and praziquantel deal with the internal cat parasites. The triple-action formula of Nexgard Combo keeps cats safe from deadly parasites. Nexgard Combo is suitable for kittens from eightweeks of age and adult cats.