The Impact of Age on Botulinum Toxin Potency in Facial Rhytides Treatment

Botulinum toxin is approved by the FDA for the treatment of facial wrinkles. Patients are usually older than 45 years and their main demand is to treat pre-existing facial wrinkles. However with the increasing popularity of this technique, younger patients, aged 25 to 35 years, are now seeking botulinum toxin injection as a preventive measure for rhytides. The usual dose used for the treatment of facial rhytides in a female patient older than 45 years is 50 units. No consensus exists concerning the dose of botulinum toxin that should be used in younger patients. Hypothesis: lower dose of botulinum toxin is sufficient to give good and long lasting results in young patients. The objective of this randomized open-label study is to evaluate the effect of lower doses of Botulinum toxin on the facial rythides in young patients.