Elizabeth Arden, Inc. has entered into an exclusive co-marketing agreement with Allergan, Inc., the maker of Botox Cosmetic and M.D. Forte, a physician-dispensed skin care line. The partnership will bring a newly formulated Prevage anti-aging treatment to prestige cosmetic retailers worldwide through Elizabeth Arden. The new formulation will contain 0.5% idebenone, a patented antioxidant. The physician-strength product containing 1% idebenone will be known as Prevage MD and will continue to be sold by Allergan through physicians.