It could be a dose gap that occurs so regularly; if so, he might need a little more medication in the middle of the day. Antidepressants can work well against episodes of anxiety. Drooling can also be improved by reviewing his Parkinson’s medication, but there are also certain medicines one could try. And then there are other recommendations, such as chewing gum to stimulate the swallowing of saliva. /Dag Nyholm