PANACUR® POWERPAC has a high degree of efficacy against all stages of encysted (hypobiotic) small strongyles. Only approved method of larvicidal treatment for encysted EL3’s and L3/L4’s. 98% effective in killing hypobiotic encysted EL3’s. 96% effective against L3/L4’s. Highly effective against the predominant internal parasites of horses: large strongyles, small strongyles (encysted early third stage cyathostomes), late third stage and fourth stage mucosal cyathostome larvae, pinworms, ascarids and arteritis caused by fourth stage larvae of strongylus vulgaris in horses. se in all newly arrived horses and then once or twice per year. PANACUR® POWERPAC (5 x 57 gram syringes) offers a complete course of treatment for a 1250 lb horse. Convenient, oral administration. Unique artificial apple-cinnamon flavor. Consult you veterinarian for assistance in the diagnosis, treatment and control of parasitism.