What kind of Chinese medicine is good for a tongue that is always yellow and greasy?

Tongue coating has been yellow and thick and greasy, through accurate identification can be eaten damp-heat tablets, liver and gallbladder clear tablets or Bazheng granules and other proprietary Chinese medicines, there is no so-called which proprietary Chinese medicines are good.
Tongue coating yellow thick and greasy, the main damp-heat or phlegm-heat and other evils within, or food accumulation (food indigestion and stagnation in the stomach) stomach and intestines, viscera gas is impassable.

If it is a case of Damp-Heat in the Large Intestine, you can take Damp-Heat Tablet. This medicine can clear heat and dry dampness (removing heat and drying dampness), astringent intestines and stop dysentery. It is used for abdominal pain, diarrhea and bloody diarrhea. Pregnant women should not take it.
If it is a case of damp-heat of liver and gallbladder, you can take Liver and Gallbladder Clearing Tablets, this medicine can clear heat and dampness, and benefit the gallbladder to remove stones. It is used for cholecystitis and cholelithiasis caused by damp-heat of liver and gallbladder. Pregnant women are forbidden to take it.
If the bladder is damp-heat syndrome, you can take Bazheng granules, this drug can clear heat, diuretic, and clear the drenching. It is used for damp-heat underflow (dampness and heat invading the intestines, bladder, pubic area, lower limbs, etc.), short and red urine (small amount of urine, dark yellow color), dripping and astringent pain, dry mouth and throat. It is contraindicated in pregnant women.
The adverse effects of the above drugs are not clear, need to be treated under the diagnosis and treatment of a professional Chinese medicine practitioner, and should not be taken on their own.