Nature: acrid, slightly warm
Enters: Lung, Stomach
Actions: Releases exterior syndromes by promoting sweating (strong); expels summer-heat; adjusts function of the stomach to resolve dampness; promotes urination, relieves edema; reduces swelling.
• Wind-cold or summer-heat with dampness: fever, aversion to cold, headache, abdominal pain, vomiting, lack of sweats, chills, body aches, diarrhea.
• Edema with scanty urination, urinary difficulty, especially when associated with an exterior pattern.
• Simultaneously expels summer-heat from the exterior and transforms turbid dampness in the interior.
• Mainly used in summer.
• For exterior disorders, cook only a short time.
• For edema, cook a long time into a concentrated decoction.
• So effective for summer-heat with dampness that it is sometimes called the “summertime Ma huang.”
• May cause vomiting if taken hot. Take at a room temperature or add Huang qin or Huang lian to reduce this effect.