Xalatan Sterile Ophthalmic Solution (Pharmacia & Upjohn) Xanax XR Tablets (Pharmacia & Upjohn) Xeloda Tablets (Roche Laboratories) Xenaderm Ointment (Healthpoint) Xenazine (tetrabenazine) Tablets (Cambridge Laboratories) Xenical Capsules (Roche Laboratories) Xerac AC Solution (Person & Covey) Xiaflex (Collagenase clostridium histolyticum) for injection, for intralesional use (Auxilium) Xifaxan Tablets (Salix) Xigris Powder for Intravenous Infusion (Lilly) Xolair (Genentech) Xopenex HFA Inhalation Aerosol (Sepracor) Xopenex Inhalation Solution (Sepracor) Xopenex Inhalation Solution Concentrate (Sepracor)