A standard Botox session is quick, often 10 to 20 minutes

https://www.scribd.com/document/1008600723/Botox-Wrinkle-Relaxing-Treatment-What-Happens-During-the-Procedure-177531

A standard Botox session is quick, often 10 to 20 minutes, involving tiny injections with a fine needle; most patients describe the sensation as brief pinches with little to no recovery time needed.