Hi.. Thanks for the query.. Dry mouth can occur due to a number of causes and as you are on a number of medications, it can be a side effect of the medications.. Other common causes can be severe dehydration, salivary gland dysfunction, nerve damage supplying salivary glands, oral infections like thrush, sjogren s Syndrome..etc.. You should also check for blood sugar levels as high blood sugar levels can also cause dry mouth.. -For dry mouth chew sugarfree chewing gums.. -Drink plenty of water. -Avoid regular mouthwash and use specialized mouthwash that are formulated for dry mouth patients like Biotene.. -You can also instil artificial saliva drops.. -Suck tart candies as it also stimulates saliva flow.. If does not improve consult yourl Physician and get evaluated.. Hope this helps.. Regards.