Average Length of Time Botox Lasts?

It varys from patient to patient. Typically you will see results lasting between 3-4 months but we do have patients the see it lasting longer. Best of luck 

8 weeks is not the average duration, but it's not an uncommon length of time.  The strength of the muscles treated, patient's physiology, and the dosage of Botox used can all factor into the time a treatment lasts.  

If you'd like to see if you can extend the time between treatments you can try increasing the dosage slightly, or trying Dysport.