How do you calculate how many botox units needed to inject the glabella and crow's feet area?

The amount of units of Botox ® to treat the glabella and the
crow’s feet area depends on how active is the muscle and how evident and deep
the lines are in those areas. In average the amount of Botox needed in those
areas range from 5 units to 15 units. Patients interested in undergoing Botox
treatment of the glabella and crow’s feet are should consider making a consultation
with a Board Certified Plastic Surgeon specialized in Botox treatments.



John Mesa

Board Certified Plastic Surgeon

Livingston, Hoboken, Edgewater, NJ

New York City, NY

The amount of Botox needed to achieve a desired effect (e.g. wrinkle reduction) depends on the mass or bulk of the muscles, the strength that the muscle pulls on the skin, and the severity of the dynamic wrinkles.  I evaluate these factors during a consultation.  1 unit will always equal the dosage of 1 unit of Botox, regardless of how many units are packaged in the bottle or how the dilution is done by your doctor.  There's a wide range of "typical" dosages for an area.  A glabella with weak muscles may only require 20 units while a male with strong eyebrow muscles may require 40 units in that same area.  

The number of units I use on a patient depends on my examination.  So each person is unique and requires a speicific amount to treat their wrinkles.  I would suggest consulting a doctor with a lot of experience and asking what is right for you.