Competition for NexGard includes 1-800-PetMeds, K9 Advantix II, Frontline, VIP Pet Care, Elanco Companion Animal Health and the other brands in the Health & Beauty: Pet Care industry. You can connect with NexGard on Facebook or by phone at 888-637-4251. NexGard TV Spot, 'See Why'. NexGard Chewables TV Spot.