Botulinum toxin is a very successful medical treatment for facial lines and wrinkles. This is a neuromuscular blocking agent. Botox is injected into the central scowl lines (glabellar lines) and produce muscle weakness and thereby reducing prominence of the lines. This can also be used to lessen crows feet, bunny lines, marionette lines and smoker's lines. Botox can be also be used to reduce excessive localized sweating especially in hands and armpits The effect of this injection lasts for a few months. Repeated injections can be given. Botox should not be used in pregnancy or when breast feeding.