This is the key question. Side effects can occur and I ensure my patients are well aware of these. If for some reason the toxin moves to a muscle which is not a target muscle, such as the muscle which opens the eye or the ocular muscles which move the eye, then side effects can occur. These are rare and involve drooping of the eyelid, or double vision. Remember that the effects of Botox last only for four to six months at best, and when a really small dose causes a side effect, it usually reverses itself back to normal in three to four weeks. |