Here is a thorough comparison between Credelio & Nexgard explained in detail with additional thoughts to similarities & differences between the pet products
The Big 5 Protection Pack provides protection against a wide range of external and internal parasites. It consists of Interceptor Spectrum chews and Credelio tablets. The Big 5 Protection Pack is an advanced oral treatment that controls fleas, paralysis ticks, intestinal worms including tapeworms in dogs and heartworms. When given as monthly dosage, it protects your dogs from various types of parasites.