42 year old male, how long does buspar (buspirone) stay in your system. i have been taking 15mg a day for 3.5 weeks. 7.5 mg twice a day.?

3-hours half-life: Buspar (buspirone hcl) has a relatively short half-life (the time it takes for 1/2 to disappear in your body) is only about 3 hours. Typically, after 5-6 half-lives, there isn't much left in the body following the last dose. Because you r using a small dosage, there isn't much in your body after a day or 2. If you have additional concern, repost questions or consult doc. Good luck.

Buspar (buspirone): Half life @4 hours, so 4x5 is @ 20 hours.