药功坊：特效止痛水（外伤者其痛立止）

采编：张元

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天南星一个，牛胆一个，

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将天南星放进牛胆内，放在阴凉处吹干，使胆汁浸入药内，

将药物研成粉末，将粉末浸入水中，使药性散发到水中，如遇受外伤者，将此药水涂于伤处，其痛立止。此水不能口服。（公众号：太乙玄门）