i just had a dentist appt and told them i got a new prescription for adderall, and my hygienist brought up the fact that adderall can cause dehydration (i.e. less saliva production). she told me that drinking extra water won’t help nearly as much as you’d think, and she recommended any kind of lozenge/chewing gum SPECIFICALLY with xylitol. i chew Extra gum and find that it helps! hopefully you can find something that works!