SPL Set ID: 48e6e53a-d904-475b-84dd-6068cc0cb36b

Scopolamine transdermal system is designed for continuous release of scopolamine following application to an area of intact skin on the head, behind the ear. Each system contains 1.16 mg of scopolamine base. Scopolamine is (9-methyl-3-oxa-9-azatricyclo[3.3.1.0 2,4 ]nonan-7-yl) 3-hydroxy-2-phenylpropanoate. The empirical formula is C 17 H 21 NO 4 and its structural formula is: Scopolamine has a molecular weight of 303.35 and a pKa of 7.55 to 7.81. The scopolamine transdermal system is a circular, 0.2 mm thick, 1.55 cm 2 film with four layers. Proceeding from the visible surface towards the surface attached to the skin, these layers are: (1) a backing membrane of tan-colored, pigmented polyethylene/polyester film printed with brown ink; (2) a solid matrix drug reservoir layer of silicone adhesive, scopolamine, povidone and dimethicone; (3) a microporous monolayer polypropylene membrane that controls the rate of delivery of scopolamine from the system to the skin surface; and (4) an adhesive formulation of silicone adhesive, povidone, dimethicone and scopolamine. A protective, oversized release liner of fluoropolymer-coated polyester, which covers the adhesive formulation layer, is removed before the system is used. Cross section of the system: Structural Formula Patch System