Botox in Crow's Feet Number of Units Needed

Each individual needs different amounts of units depending on their anatomy.  that being said if my patient said that 20-30 units was all that they have needed in the past and had great results that is what i would stay with.  I personally dont remember ever having a patient who needed 40 untis for their crow's feet .  I would check to be sure they are not using Dysport which would be closer to 40-50 units.   That being said always check credentials / training etc and be sure you are being treated by a DOCTOR who has formal specialiazed training in Botox injections (board certified dermatologist/ plastic surgeon/ facial plastic surgeon/ oculoplastic surgeon)