<p>Huang Lian is bitter and indicated for heart vexation. Huang Lian&rsquo;s nature is bitter, and heart vexation is its action. In Zhang Zhongjing&rsquo;s formulas, it&rsquo;s secondly indicated for glomus below the heart, vomiting and diarrhoea. If the secondary indications present without the primary indication of heart vexation, Huang Lian will be ineffective. If, however, there are the secondary indications along with heart vexation, Huang Lian will be effective. The Shen Nong Ben Cao Jing is incorrect, Huang Lian has only one primary action for heart vexation. All herbs have a single primary action, not multiple ones!<br />
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<p>Huang Lian can be found anywhere and should be grated before use.</p>
