Buspirone Monotherapy for Generalized Anxiety Disorder

Introduction to Buspirone Therapy

Buspirone monotherapy is effective for generalized anxiety disorder, but requires patience as it takes 2-4 weeks to become effective, and is most appropriate for mild to moderate anxiety in patients who can tolerate gradual symptom relief rather than immediate anxiolytic effects, according to the American Academy of Family Physicians 1, 2

The initial dose of buspirone should be 5 mg twice daily, with a titration schedule that increases by increments of 5 mg every 5-7 days based on response and tolerability, as recommended by the American Academy of Family Physicians 1, 2
The maximum dose of buspirone is 20 mg three times daily, totaling 60 mg/day, according to the American Academy of Family Physicians 1, 2
A full therapeutic trial of buspirone requires at least 4-8 weeks at the target dose before declaring treatment failure, as stated by the American Academy of Family Physicians 1

The American Academy of Family Physicians recommends that buspirone not be used as first-line therapy for generalized anxiety disorder, instead suggesting SSRIs, such as escitalopram, paroxetine, and sertraline, and SNRIs, such as venlafaxine, as preferred initial treatments 3, 4
When SSRIs fail, augmentation with buspirone shows similar efficacy to bupropion augmentation, though buspirone has higher discontinuation rates due to adverse events, according to the Annals of Internal Medicine 5, 4

If no response is seen after 8 weeks at the maximum tolerated dose of buspirone, consideration should be given to switching to an SSRI, such as escitalopram, sertraline, or paroxetine, as first-line agents, as recommended by the American Academy of Neuropsychopharmacology 3, 4
Alternatively, an SNRI, such as venlafaxine or duloxetine, may be considered as a first-line or second-line option, according to the Journal of the American Academy of Child and Adolescent Psychiatry and the American Academy of Neuropsychopharmacology 3, 6, 4