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sniffers of volatile substances, such as adhesives, organic solvents and gases, and abusers of general drugs which do not come under the control of drug regulations, such as dextromethorphan, have been found frequently since 1990.
自1990年以来，经常发现有人吸食挥发性物质如胶粘剂、有机溶剂和气剂及 "滥用药品条例 "不加管理的一般药品如美沙芬等。