Fishweed Oral Liquid is a heat-clearing medicine, which is fine if treating a hot cough, but it is not suitable for treating phlegm-damp cough, cold-damp cough or qi deficiency cough. Because fishweed itself clear heat, into the lung meridian, so can clear lung heat and can promote the discharge of phlegm, it is most suitable for the actual evidence, at the same time if there is yellow phlegm heat, fishweed oral solution is more suitable. But this time should also pay attention to, if it is heat but usually the spleen and stomach is relatively cold, the coldness of fishy grass is relatively large, on the spleen and stomach is still not good effect, some spleen and stomach cold people may feel very uncomfortable stomach, or even nausea, vomiting feeling, occasionally bloating, intestinal chirping, yagyu gas, and diarrhea will be the case. Therefore, if the use of the spleen and stomach cold and solid heat evidence, we must pay attention to the amount to take, and then after taking can drink some hot porridge, or drink some light ginger water to neutralize the drug, to prevent injury to the spleen and stomach.