People with yin deficiency and excessive fire can't drink Sanzi decoction, or people with lung deficiency and cough can't drink it. If you are weak, you can't drink too much stomach acid because of spleen deficiency, otherwise it will do great harm to your stomach and you can't drink it often.

Even it can warm phlegm, reduce qi and promote digestion, treat intractable cough or chronic bronchial asthma, and try not to take it for a long time or drink it as tea, which can prevent acetylcholine from reducing the isolated lung flow of guinea pigs.

Three aspects should be paid attention to when cooking traditional Chinese medicine:

1, soaking before decocting

Generally, cold water is added to make the surface of the drug overflow, and then it is decocted after soaking, so that the effective components are easy to decoct. Generally, it can be soaked for about 30 minutes, but it should be treated separately according to the weight of medicinal materials and the difference of season and temperature. Soak flowers, grass and leaves for 20 minutes; Roots, seeds, fruits, minerals and crustaceans should be soaked for 30-60 minutes. In short, the soaking of medicinal materials shall prevail.

2. Selection of decocting water

Water is the most commonly used solvent for decocting traditional Chinese medicine decoction. Generally, clean cold water should be selected, such as tap water, well water and distilled water. The water consumption should be determined according to the weight, volume, water absorption, decocting time, duration and required dosage of the drug, and it is generally appropriate for the water to overflow the drug for about half an inch. The water consumption of decocting medicine should be enough at one time, and water should not be added several times in the middle. It is even more impossible to fry the medicine dry before adding water. Dry medicine should be thrown away.

3. Decocting temperature

There are "fierce fire" and "slow fire" in decocting traditional Chinese medicine, with "fierce fire" in acute fire and "slow fire" in slow fire. Generally, we use force first, that is, we use fire first, and then use it slowly when the fire starts. Different prescriptions need different decocting time. The decoction time of antiperspirant for treating exogenous exterior syndrome should be short, and that of tonic for treating deficiency syndrome should be long.

Refer to the above content: People's Daily Online-Three Notes on Cooking Chinese Medicine