SPL Set ID: db4696da-7820-4b2b-97b4-fb05b1208020

Estradiol Transdermal System, USP is designed to release estradiol continuously upon application to intact skin. Six (7.5, 11.25, 15, 18, 22.5 and 30 cm 2 ) systems are available to provide nominal in vivo delivery of 0.025, 0.0375, 0.05, 0.06, 0.075 or 0.1 mg respectively of estradiol per day. The period of use is 7 days. Each system has a contact surface area of either 7.5, 11.25, 15, 18, 22.5 or 30 cm 2 , and contains 1.888, 2.832, 3.777, 4.532, 5.665 or 7.553 mg of estradiol USP respectively. The composition of the systems per unit area is identical. Estradiol USP is a white or creamy white, small crystals or crystalline powder, odorless, stable in air and hygroscopic. Estradiol USP is chemically described as estra-1,3,5(10)-triene-3, 17ß-diol. It has an empirical formula of C 18 H 24 O 2 and molecular weight of 272.38. The structural formula is: The Estradiol Transdermal System, USP comprises three layers. Proceeding from the visible surface toward the surface attached to the skin, these layers are: A translucent polyethylene film. An acrylate adhesive matrix containing estradiol USP. A protective liner of silicone coated polyester film is attached to the adhesive surface and must be removed before the system can be used. Cross Section of the System Estradiol Transdermal System, USP is packaged with additional pieces of protective film above and below the system within each pouch. These are discarded at the time of use. The active component of the system is estradiol USP. The remaining components of the system (acrylic adhesive, colloidal silicon dioxide, ethyl oleate, glyceryl monolaurate, isopropyl myristate, povidone and polyethylene backing) are pharmacologically inactive. FDA approved drug release test specifications differ from USP. Estradiol Transdermal System Estradiol Transdermal System