I am on Exovac which seems to work somewhat, although you have to be careful when (and how many) you take the pills... otherwise you end up in a pool of sweat.
In my case as well one of parotids was only minimally radiated, nevertheless it also folded up for a while. It may take a while for it to come out of hibernation.

M
.... just to think that I USED to like salt and vinegar chips!!!