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继发反应(secondary effect)并不是药物本身的效应,而是药物主要作用的间接结果,是药物作用诱发的反应。加广谱抗生素长期应用改变正常的肠道菌群的关系使肠道菌群失调引致维生素缺乏和二重感染;
Secondary effect is not the effect of the drug itself, but an indirect result of the primary effect of the drug and is a drug-induced response. Long-term use of extended spectrum antibiotics to change the relationship between the normal intestinal flora so that intestinal flora imbalance caused by vitamin deficiency and double infection;