SPL Set ID: e8b8ec8d-1318-43e4-a182-446e9f9579de

edex ® (alprostadil for injection) is a sterile, pyrogen-free powder containing alprostadil in an alfadex (α-cyclodextrin) inclusion complex. Alprostadil is an endogenous substance known as prostaglandin E 1 (PGE 1 ). edex ® is supplied in single-dose, dual-chamber cartridges. edex ® is lyophilized in single-dose, dual-chamber cartridges intended for use with the reusable edex ® injection device. One chamber of the cartridge contains alprostadil, alfadex and lactose as a sterile, pyrogen-free powder. The other chamber contains 1.075 mL of sterile 0.9% sodium chloride. The edex ® cartridges are supplied in three strengths: 10-mcg cartridge (10.75 mcg alprostadil, 347.55 mcg α-cyclodextrin, 51.06 mg lactose); 20-mcg cartridge (21.5 mcg alprostadil, 695.2 mcg α-cyclodextrin, 51.06 mg lactose); 40-mcg cartridge (43 mcg alprostadil, 1,390.3 mcg α-cyclodextrin, 51.06 mg lactose). The edex ® injection device is used to reconstitute the sterile powder in one chamber with the sterile 0.9% sodium chloride in the other chamber. After reconstitution, the edex ® injection device is used to administer the intracavernous injection of alprostadil. The chemical name for alprostadil is (1R,2R,3R)-3-Hydroxy-2-[(E)-(3S)-3-hydroxy-1-octenyl]-5-oxocyclopentane heptanoic acid. The empirical formula is C 20 H 34 O 5 and the molecular weight is 354.49. The chemical structure is: The α-cyclodextrin inclusion complex improves the water solubility of alprostadil. The empirical formula of α-cyclodextrin is C 36 H 60 O 30 and the molecular weight is 972.85. The chemical structure is: Alprostadil alfadex is a white, odorless, hygroscopic powder. It is freely soluble in water and practically insoluble in ethanol, ethyl acetate and ether. After reconstitution, the active ingredient, alprostadil, immediately dissociates from the α-cyclodextrin inclusion complex. The reconstituted solution is clear and colorless and has a pH between 4.0 and 8.0. When the single-dose, dual-chamber cartridge containing either 10.75, 21.5, or 43 mcg of alprostadil is placed into the edex ® injection device and reconstituted, the deliverable amount of alprostadil in each milliliter is 10, 20 or 40 mcg, respectively. alprostadil chemical structure α-cyclodextrin chemical structure