SPL Set ID: 66c6af99-9909-4b18-a43b-898a1c4a34d7

Doxepin hydrochloride is one of a class of psychotherapeutic agents known as dibenzoxepin tricyclic compounds. The molecular formula of the compound is C19H21NO•HCl having a molecular weight of 315.84. It is a white or almost white crystalline powder freely soluble in water, in ethanol and in dichloromethane. Soluble in chloroform and in methanol. It may be represented by the following structural formula: Chemically, doxepin hydrochloride is a dibenzoxepin derivative and is the first of a family of tricyclic psychotherapeutic agents. Specifically, it is an isomeric mixture of 1- Propanamine, 3-dibenz[b,e]oxepin-11 (6H)ylidene-N,N-dimethyl-hydrochloride. Each 10 mg, 25 mg, 50 mg, 75 mg and 100 mg doxepin hydrochloride capsules, USP for oral administration contains doxepin hydrochloride, USP equivalent to 10 mg, 25 mg, 50 mg, 75 mg and 100 mg of doxepin, respectively and the following inactive ingredients: colloidal silicon dioxide, corn starch, magnesium stearate, microcrystalline cellulose, pregelatinized starch and sodium lauryl sulfate. The empty gelatin capsule shells contain D&C Yellow No. 10 (25 mg, 50 mg, 75 mg and 100 mg), FD&C Red No. 40 (25 mg and 50 mg), FD&C Green No. 3 (75 mg and 100 mg), gelatin, iron oxide yellow (10 mg only) and titanium dioxide. The imprinting ink contains black iron oxide, potassium hydroxide and shellac. Meets USP Dissolution Test 3. doxepin-struct