Its possible that the white spots are a side effect of the medication although I can't find any documentation of any such cases. There are cases of skin pigmentation cases, dry mouth and changes in taste and smell. The amiodarone can stay in your system for months. Since the medication has been stopped, I would keep an eye for any new changes in your mouth. Any problems that arise or worsen would warrant an evaluation by a dentist or an oral medicine doctor although there may not be much they can do since the medication is stopped.