Botox is generally very well tolerated by the vast majority of patients, which is just part of the reason that it is so incredibly popular among so many people. Botox toxin is made from the purified product of a common and serious bacteria. Because this toxin is so effective, it actually destroys the nerve attachments of cells to muscle, making the muscle completely relax until the nerve is able to reattach, which is usually about 3 months. The relaxation of the muscles is an excellent way to make the skin look softer, less wrinkled, and, generally, younger.
will go over all of the possible adverse reactions that could occur prior to the injections, although these are very rare. The worst case scenario, which has never been noted in someone who was receiving a cosmetic injection, would be if the toxin leaks into surrounding tissue and causes a widespread paralysis. This would be very serious, and could require further intervention. More common but still rare would be a local reaction such as redness. Also, the muscles adjacent to the area injected could be affected as well, which would potentially cause weakness more diffusely than you wanted. Bruising and pain are also rare complications. Please speak more with your doctor prior to having the injections.