Is there anything I can do to prevent dry mouth as a side effect from a drug?

I take a medication called adderall to treat my ADHD. I've tried all types of ADHD medication such as Concerta, Ritalin, Vyvanse, and Strattera. Some of them helped a little and others helped a lot but came with unbearable side effects. Now I'm on adderall and it has been a lifesaver for me. I like it because of the added focus I get from it, plus it doesn't really seem to change my personality much, to my surprise(all the other meds made me feel like a completely different person). The only issue I've had with it is that I can really bad dry mouth from it and it bothers me a lot. So, is there anything I can do to prevent the dry mouth? I tried drinking water but I become thirsty to the point where I was consuming like 16 bottles of water a day. Hell I can't do that though I'm not no damn camel. Is there something else I could do b/c this cotton mouth is making me want stab myself in the face. HAte it. A lot.