The usage, treatment of diseases, and efficacy of dry half-summer and French half-summer are different. Dry half-summer is a kind of raw half-summer, raw half-summer has both aquatic and terrestrial cultivation, dry half-summer refers to terrestrial half-summer. Raw half-summer is pungent, warm and poisonous. It has the efficacy of drying dampness and resolving phlegm (removing phlegm from the body with dampness-drying medicines), lowering the rebelliousness and stopping vomiting (stopping the upward rush of gastric qi, stopping vomiting), and eliminating lumps and dispersing knots, and externally, it is effective in subduing swellings and relieving pain (eliminating swellings and pains). Because of the toxicity of raw half-summers, it is used externally to treat carbuncles and gangrene (a kind of poisonous sores, acute suppurative diseases occurring on the surface of the body, limbs and internal organs), swelling and poison, bruises and pains, poisonous snake bites and other diseases, which must be used in accordance with the doctor’s instructions, and must not be unauthorized use of medication. French half-summer is dry half-summer with alum and other concoctions, concocted to reduce the toxicity and warm dry nature. It enhances the effect of drying dampness and resolving phlegm, and is mostly used in the treatment of acute and chronic bronchitis, asthma, pneumonia, coughing, phlegm and mucus. Half-summer is not suitable for pregnant women, Yin deficiency and dry cough, blood heat, hot phlegm, dry phlegm and other people or diseases. It is recommended that according to their own illnesses and diseases, under the guidance of a doctor to identify and select the drug symptomatic treatment, do not self-medication, in order to avoid adverse consequences.