Botox - How often should I have it?
Botox produces paralysis limited to specific facial muscles that are injected. The paralysis of specific muscles, in turn, eliminates or lessens the wrinkles that arise over top of the muscle. Botox works by blocking the nerve signal that stimulates muscle movement. This block usually takes full effect by approximately 36 hours after injection. Because the junction between nerves and muscles (neruomuscular junctions) are constantly turned over, muscular function gradually returns after approximately 3 months. These new neruomuscluar junctions prevent permanent paralysis of the treated muscle and necessitate re treatment every 3 months.
