When antibodies are formed, the effect may be that one is no longer able to respond to the therapy. High doses and frequent injections of botulinum toxin have been linked to the formation of antibodies. The likelihood of forming antibodies is reduced by having treatment no more frequently than about every three months. Only your physician can determine the best course of therapy. Ensure that your doctor is aware of any current medications you are taking.
All medications have some side effects.
Some people notice temporary weakness of muscles or discomfort at the injection site.