DESCRIPTION
Buspirone hydrochloride is an antianxiety agent that is not chemically or pharmacologically related to the benzodiazepines, barbiturates, or other sedative/anxiolytic drugs.
Buspirone hydrochloride is a white, crystalline, water soluble compound with a molecular weight of 422.0. Chemically buspirone hydrochloride is 8-[4-[4-(2-pyrimidinyl)-1-piperazinyl]-butyl]-8-azaspiro[4,5]decane-7,9- dione monohydrochloride. The molecular formula C21H31N5O2 • HCl is represented by the following structural formula:
Each tablet for oral administration contains 5 mg, 10 mg, or 15 mg of buspirone hydrochloride USP (equivalent to 4.6 mg, 9.1 mg, and 13.7 mg of buspirone free base respectively). The 5 mg and 10 mg tablets are scored so they can be bisected. Thus, the 5 mg tablet can also provide a 2.5 mg dose, and the 10 mg tablet can provide a 5 mg dose. The 15 mg tablet is provided in a special tablet design. This tablet is scored so it can be either bisected or trisected. Thus, a single 15 mg tablet can provide the following doses: 15 mg (entire tablet), 10 mg (two-thirds of a tablet), 7.5 mg (one-half of a tablet), or 5 mg (one-third of a tablet). In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and sodium starch glycolate.
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