SPL Set ID: b201fe68-b5e5-4a6f-8cf1-069543f03e76

Rivastigmine Transdermal System contains rivastigmine, a reversible cholinesterase inhibitor known chemically as (S)-3-[1-(dimethylamino) ethyl]phenyl ethylmethylcarbamate. It has an empirical formula of C 14 H 22 N 2 O 2 as the base and a molecular weight of 250.34 g/mol (as the base). Rivastigmine is a viscous, clear, and colorless to yellow to very slightly brown liquid that is sparingly soluble in water and very soluble in ethanol, acetonitrile, n-octanol and ethyl acetate. The distribution coefficient at 37°C in n-octanol/phosphate buffer solution pH 7 is 4.27. Rivastigmine Transdermal System is for transdermal administration. The patch is a 4-layer laminate containing the backing layer, drug matrix, adhesive matrix and release liner ( see Figure 1 ). The release liner is removed and discarded prior to use. Figure 1: Cross Section of the Rivastigmine Transdermal System Layer 1: Backing Film Layer 2: Drug Product (Acrylic) Matrix Layer 3: Adhesive (Silicone) Matrix Layer 4: Release Liner (removed at time of use) Excipients within the formulation include acrylic adhesive (applied to a flexible polymer backing film), acrylates copolymer, silicone adhesive. Chemical Structure Figure 1