The main components of antelope horn single crystal are antelope horn, Radix Rehmanniae Preparata, cooked Radix Astragali, cooked Poria, cooked Radix Paeoniae Alba and cooked Radix Glycyrrhizae. It has the effects of clearing away heat and toxic materials, moistening lung, relieving cough, promoting blood circulation and removing blood stasis, and can be used for treating cough due to lung heat, expectoration due to lung heat, yellow expectoration due to lung heat, white expectoration due to lung heat, and expectoration due to lung heat. Antelope is very effective in clearing away heat and toxic materials, moistening lung and relieving cough, promoting blood circulation and removing blood stasis, improving pneumonia symptoms, relieving cough and resolving phlegm, improving respiratory symptoms, improving lung inflammation, improving lung tissue structure and improving lung function.