People will have to register personal information when buying cold medicine in stores in Zhejiang province, starting Sept 10, Beijing News reported Thursday.
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The local public security authority published a notice requiring drug makers and wholesalers to keep client documents when trading in medicines that contain ephedrine, which can be used as a component of illegal drugs like smokable methamphetamine, or ice.
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Retailers also are required to register customers' name, address, time of purchase and amount purchased.
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Police found some criminals using cold medicine to make illegal drugs in several provinces including Jiangsu, Zhejiang and Shandong.