@Mammmood - Yeah, it’s more common to hear about dry mouth than too much saliva, as the article talks about. I can’t recommend whether or not you should take the second drug. A doctor would be a better advisor.
I do believe that what goes on in your oral health is a good predictor of your overall health, whether you’re talking about dry mouth, innervation of the tongue or whatever.
I don’t say this just as my own personal opinion, but based on what medical science has discovered. There is a direct correlation between oral health and health in other parts of your body, like cardiovascular health, perhaps because your mouth opens your body to food (and bacteria). Also, your mouth can expel stuff too, if I can say that without grossing you out too much.