Interceptor is safe for use in cats, but Interceptor Plus is formulated only for use in dogs. Arguably, the most notable difference between these products is that Interceptor Plus contains a second active ingredient - Praziquantel. This additional ingredient offers added protection against tapeworms.

What is the difference between Interceptor and Interceptor PLUS?

While both Interceptor and Interceptor Plus prevent heartworm disease, roundworms, hookworms, and whipworms, Interceptor Plus also prevents tapeworms. ... While Interceptor is ok for dogs that are breeding, nursing, or pregnant, the safety of Interceptor Plus for dogs in those states has not yet been determined.

Why was interceptor for dogs discontinued?

Why was interceptor for dogs discontinued? The Greenfield, Ind., veterinary drug maker inherited Interceptor from Novartis Animal Health, which discontinued the monthly medication in 2013 because of quality-control issues. Interceptor (milbemycin oxime) is formulated to prevent heartworms and intestinal worms.