Dry mouth should be clearly caused by the cause before deciding on the medication. For dry mouth caused by diabetes, if the blood sugar control does not meet the standard, you need to take glucose-lowering drugs to treat it, such as oral glimepiride, metformin, etc. If necessary, you need to use insulin, the specific glucose-lowering drugs need to be decided by the doctor according to the blood sugar and the condition. If a diabetic patient whose blood sugar is under control still has dry mouth, he or she can use drugs such as Tianmai Xie Xie Wan and Jin Li Da to quench thirst. If the dry mouth is caused by insufficient water intake, you need to drink more water. If dry mouth is caused by uremia, it can be treated with oral arginine pepstatin. There are other diseases that can cause dry mouth, and medication needs to be used according to the cause.