Er Chen Tang is contraindicated in cases of Yin deficiency, blood deficiency, vomiting of blood as well as those with thirst, and should be used with caution in cases of dry phlegm, as it may aggravate the condition. This formula is recommended to be taken under medical supervision. Er Chen Tang is composed of Pinellia, Poria, Tangerine, Ginger, Plum and Glycyrrhiza, which is a representative formula for resolving phlegm by drying dampness (removing phlegm from the body by drying dampness). It is suitable for the symptoms of Dampness-Phlegm syndrome, such as cough with excessive phlegm, chest congestion, and heavy limbs (weakness and heaviness of the limbs). However, as the medicines in this formula are mostly warm and dry, Er Chen Tang is contraindicated in cases of yin deficiency, blood deficiency, vomiting of blood and thirst, and should be used with caution in cases of dry phlegm to avoid aggravating the condition. It should be noted that Er Chen Tang is generally not recommended to take without authorization, please use under the guidance of a physician.