Yikexin, the vitamin AD drops, is produced by Shandong Dyne Marine Biopharmaceutical Co., Ltd., and Yikexin is the trade name given to the drug by the company. Other pharmaceutical companies or factories may also produce the drug, but it will not be named Yikexin. This is the trademark right. Now there are many vitamin AD drops produced by manufacturers in the market. So-called "counterfeit" can be taken seriously, and the quality of ordinary counterfeit drugs can not be guaranteed.