Durvet Intervet Panacur Powerpac Blue 57 Gram Pack Of 5 - 001-069276 For the control of large strongyles, encysted early third stage, late third stage and fourth stage For use in horses. Apple-cinnamon flavor makes it highly palatable to horses. Approved for concurrent use with an approved form of trichlorfon (boticide). 5 x 57 gram syringes.