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Think of it as 小青龙汤, but

• Instead of 桂枝 add 射干
• Instead of 干姜 use 生姜
• Instead of 甘草 add 大枣
• Instead of 芍药 add 款冬花、紫菀

Use it when exterior signs are not so significant, but the phlegm is generating profusely enough to cause 水鸡声. Also likely that the patient body is deficient and tending toward cold.