what is onabotulinumtoxina
OnabotulinumtoxinA (BotoxÂ®) is a prescription injection approved to: 1  Treat severe underarm sweating that has not responded to other treatments. 2  Treat eyelid twitching or spasms (known medically as blepharospasm) 3  Temporarily improve the appearance of wrinkles between the eyebrows (frown lines) and crow's feet.