1, 38-45 degree liquor is suitable. 2. As for medicinal liquor, more than 20% ethanol has antiseptic effect, and more than 40% ethanol can delay the decomposition of some components. Because it has the characteristics of promoting blood circulation, dispersing easily, absorbing easily and having drug effect, the prescriptions used for treating arthralgia due to wind-cold-dampness, promoting blood circulation and relieving pain, and strengthening and nourishing are often made into medicinal liquor, and the effect is good. The alcohol content of medicinal liquor should be 35-45%. 3. Regarding the use of liquor, medicinal liquor is defined as liquor, which should be colorless, transparent, free of precipitated impurities and tasteless. The content of methanol shall not exceed 0. 12g per 100ml, fusel oil shall not exceed 0. 15g per 100ml and lead shall not exceed 0.65438+ per 100ml. 4. Regarding the concentration of liquor, medicinal liquor is mostly a compound preparation, and its effective components are extremely complicated. The extraction of fat-soluble components with ethanol concentration below 30% is incomplete, and the extraction of some polysaccharides and components with polarity above 50% is also affected. Using 38-45% Chinese liquor can extract effective components to the maximum extent.