To add to the ‘canned answers’ here is one more:
As non medication, Magnesium has a muscle relaxation effect. With a big cup of water before going to sleep it could help falling asleep. (Tho make sure you are using the right kind of magnesium pill that actually gets absorbed into the body)
You are swallowing that saliva during the day. Usually we make 0.5 and 1.5 liters daily (for us measurements 2 to 4.2 cups). And that needs to go somewhere. And it is very important part of our oral hygiene too.