How Botox Cosmetic Works
July 24th, 2008
The Botox cosmetic enters the nerve endings and blocks the release of acetylcholine, a chemical that causes muscles to contract. The paralysis takes 1 to 5 days to occur and peaks in 2 to 4 weeks with results lasting from 3 to 6 months. Because the effect gradually wears off, allowing the dynamic wrinkle to return, follow up treatments are necessary to maintain the desired result. Repeat treatments may lead to improved results as the muscle causing the wrinkles becomes less responsive over time, a process called chemical denervation.