Usual Adult Dose for Anxiety:
Initial dose: 7.5 mg orally two times a day or 5 mg 3 times a day.
Maintenance dose: The daily dose may be increased in 5 mg increments every 2 to 3 days up to 20 to 60 mg/day in divided doses.
Maximum dose: 60 mg per day
 Detailed Buspirone dosage information
