EQUIMAX® is the ONLY combination ivermectin/praziquantel dewormer safe for ALL horses, including: Foals four weeks of age and older. Pregnant and lactating mares - No adverse effects on fertility. Breeding stallions - Semen quality and reproductive hormone levels remained unaffected. A full dose contains enough active ingredients to treat horses weighing up to 1,320 lb. Easy-to-use-and-handle EZE-GRIP™ syringe/applicator for more accurate dosing. A smooth, quick-dissolving apple-flavored paste provides palatability.