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

https://telegra.ph/Botox-for-TMJ-and-Teeth-Grinding-Relief-Through-Injections-03-06

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.