<p>Gan Jiang is indicated for vomiting, cough, pain and diarrhoea since they&rsquo;re all caused by water.</p>

<p>Sun Simiao said, &ldquo;If there is no Sheng Jiang, use Gan Jiang.&rdquo; According to Zhang&rsquo;s formulas, they&rsquo;re indicated for different patterns. Sheng Jiang is indicated for vomiting, whereas Gan Jiang is indicated for stagnant water. One cannot replace the other!</p>
