Question

Botox injections smooth facial wrinkles because botulin is a(n) A) ACh antagonist. B) dopamine antagonist. C) ACh agonist. D) dopamine agonist.

Answer 1

Injection of small quantities of botulinum toxin into specific overactive muscles causes localized muscle relaxation that smooths the overlying skin and reduces wrinkles. Botulinum toxin effects take about two weeks to fully develop and last three to four months.