Patients with dry mouth and panic attacks after drinking diet coffee may be caused by adverse reactions to the coffee. It is recommended that patients must stop drinking the coffee in a timely manner, pay attention to rest and observation, and do not need special treatment if the symptoms gradually ease, but if the symptoms gradually worsen, then they must go to the hospital for special treatment. If the blood sugar in the body is lower than the normal value, it will cause dry mouth, panic and even cold sweat, which is a kind of hypoglycemic reaction, and it is recommended that the patient must eat in time, and if necessary, the patient can go to the hospital to push 50% glucose treatment, which can effectively and quickly relieve this hypoglycemic reaction. Patients should also stop drinking this diet coffee to avoid causing adverse sequelae.