Which brand of micosin premix is good?

Tilmicosin is a 20% premix developed by an American company. The therapeutic dose is 65,438+0,500-2,000 g/t, and the preventive dose is about 65,438+0,000 g/t. Such a large dose has high cost and great toxicity, especially cardiac toxicity. How to solve this problem? Zhejiang University's liposome lung targeted drug delivery system can effectively increase the concentration of tilmicosin in the lung.