藿香正气散

From Tai Ping Hui Min He Ji Ju Fang, this formula treats exterior wind-cold with interior dampness stagnation causing chills, fever, headache, chest oppression, abdominal pain, nausea, vomiting, and diarrhea with a white greasy tongue coating. It simultaneously releases the exterior and transforms dampness, regulates qi and harmonizes the middle, and is particularly suited for summer 'yin-summerheat' with concurrent external contraction and internal cold-dampness dietary injury.