ActiVEX (MAXIMUM Strength) Equine Topical Pain Reliever – Developed to treat chronic joint and tendon pain in horses. This formula contains a proprietary capsaicin extract that provides horses deep penetrating, fast acting pain relief at a very affordable cost. Same great formula as our famous original (regular strength) formula with triple the amount of capsaicin extract making it the strongest topical pain reliever in the industry. This product is intended to treat more severe chronic joint and tendon pain. Note: *Capsaicin works by depleting an amino acid commonly referred to as substance p. Current scientific studies reveal that capsaicin possesses the ability to relieve pain in joints and tendons by limiting the nerve endings’ ability to produce substance p. *Money back Guarantee.