well i have never known buspar to be a sleep aid, but if it is anxiety that is keeping you awake, i suppose it would work because it definitely works to relieve anxiety. my anxiety was so bad that i would hallucinate at times and buspar cleared that right up for me. i like the fact that it is nonhabit forming. i have been taking it for years. i have problems sleeping as well and havent found a sleep med yet that really works. i dont think it is anxiety keeping me up though.