Potentially dangerous effects of DM in young children include dystonic reactions, severe involuntary muscle contractions and spasms. Further, DM is a commonly used as a drug of abuse by adolescents.

• 在美国，近3%25的门诊病人是因为咳嗽来看病的，比其他症状来的更多。咳嗽在晚上尤其麻烦，因为它会影响睡眠。消费者每年要花数十亿美元在非处方咳嗽药和感冒药上，尽管药物对于症状的缓解收效甚微。