The injectable botulinum A toxin, also called Botox (a brand name), temporarily reduces excessive muscle activity (mimicry), making lines and wrinkles less visible. Botulinum A toxin has been used for more than 30 years to soften frown lines, forehead lines and lines around the mouth. It can also elevator the brow slightly, making the eye look fresher. The muscle relaxing effect is there after about 3 days and lasts for 2 to 3 months. The muscle relaxant is also used for migraine and tension headaches, excessive sweating and teeth grinding. Our cosmetic physician Drs. Leanne Wong can tell a lot more about that.