《伤寒论·辨太阳病脉证并治中》
外感风寒之邪，症见脉象浮缓，身体不疼痛，仅感沉重，偶有减轻，如果有发热、畏寒、无汗、烦躁等主证，而又无少阴阳衰阴盛征象的，可以用大青龙汤发汗解表兼以清里。
伤寒脉浮缓，身不疼，但重，乍有轻时，无少阴证者，大青龙汤发之。
Infection of wind and cold, symptoms include floating and slow pulse, body painless, only feeling heavy, occasional relief, with main symptoms such as fever, chills, no sweating, and irritability, and no such signs as Yin deficiency and excess, Greater Ephedra Decoction can be used to induce sweating to remove the pathogen and clear heat.