SPL Set ID: efcae0f7-3491-470f-beea-1aff22178243

Doxepin hydrochloride is one of a class of psychotherapeutic agents known as dibenzoxepin tricyclic compounds. The molecular formula of the compound is C 19 H 21 NO • 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: magnesium stearate, microcrystalline cellulose, pregelatinized starch and sodium lauryl sulfate. The empty gelatin capsule shells contain D&C Yellow No. 10, gelatin, sodium lauryl sulfate and titanium dioxide. In addition, the 10 mg, 25 mg and 50 mg empty gelatin capsule shells contain FD&C Yellow No. 6 and the 75 mg and 100 mg empty gelatin capsule shells contain FD&C Green No. 3. The imprinting ink contains black iron oxide, propylene glycol, potassium hydroxide and shellac. FDA approved dissolution method differs from the USP dissolution method.