Dry mouth in the middle of the night is often caused by excessive fire in the stomach, kidney yin deficiency and other reasons, you can take rhubarb pills to clear the stomach, ox-huang detoxification pills, six flavors of dihuang pills and other drugs to treat. Da Huang Qing Stomach Pill has the effect of clearing away heat and laxative; Niu Huang Detoxification Pill has the effect of clearing away heat and toxins (removing heat and toxins from the body), dispersing wind and relieving pain; and Liu Wei Di Huang Wan has the effect of nourishing yin and tonifying the kidneys. 1. Rhubarb Stomach Clearing Pill is composed of rhubarb, mouton, betel nut, scutellaria baicalensis, and bile south star. It is used for dry mouth and tongue, headache and dizziness caused by stomach fire, dry stools, etc. It is not recommended for pregnant women. Pregnant women should not take. 2. Niu Huang Xie Tu Pill, composed of menthol, white peony, ice tablet, rhubarb and cloves. It is used for dizziness caused by heat in the liver and lungs, wind and fire, sores in the mouth and nose, toothache caused by wind and fire, outbreak of fire eyes (i.e., contagious conjunctivitis, also known as red eyes), itchy skin, etc. It is not recommended for pregnant women. Pregnant women should not take. 3. Six-flavored Dihuang Pill, composed of ripened rhubarb, cornelian cherry, peony dandruff and so on. It is used for kidney yin deficiency, dizziness and tinnitus, lumbar and knee weakness (a feeling of lumbar and knee weakness), bone vaporization and tidal fever (a burst of heat, feeling that the heat is coming from inside the bone to the outside), night sweating (abnormal sweating after going to sleep, but sweating stops after waking up), spermatorrhea, thirst, etc. It is not recommended to take the medicine while taking cold and flu, as it is also known as red eye. It is not advisable to take cold and flu medicines while on medication. When treating with medication, it is necessary to be guided by a Chinese medicine practitioner to identify the symptoms and not to use medication arbitrarily, so as to avoid adverse consequences.