Although Allergan is guilty of inappropriately marketing Botox, this does not mean that it is wrong or illegal for doctors to use Botox or other medications for non-FDA approved uses.  The fact is that for each indication that a company wants to use a drug, it has to set up a new patient trial.  These are very long and expensive, so a company will not try to get approval for every indication that it thinks that the drug is good for, unfortunately.