Alprazolam immediate-release (IR) is available as the brand-name drug Xanax. Alprazolam IR comes as an oral tablet. Alprazolam may also come in other forms, but this article does not cover them.

Alprazolam 0.25mg, 0.5mg. 1mg, 2mg; scored tabs; orange flavor. ≥18yrs: Anxiety: Initially 0.25–0.5mg three times daily. May increase at 3–4 day intervals to 4mg/day in divided doses.

Potentiated by CYP3A inhibitors; reduce alprazolam dose; caution with cimetidine, nefazodone, fluvoxamine; caution with weaker CYP3A inhibitors (eg, fluoxetine, propoxyphene, oral contraceptives).

Patients were assigned to mexazolam 1mg three times daily (n = 32) or alprazolam 0.5mg three times daily (n = 32) during 1 week, followed sequentially by a period of 2 weeks of reducing dosage ...