Hi there, I use Buspar and have not felt that it did not work however, I have had the dose bumped up once. I take 20 mg in the morning and 20 mg in the afternoon.
I did notice the difference when my dose was increased from 10 mg to 20 mg. I seems to enhance my antidepressant.
It is a drug that has been around for a long time and often prescribed for seniors as it doesn't wipe them out like some of the benzos would.