如不奏效，应有些长时间地给予小剂量抗菌药物，称为预防性用药（prophylactic therapy）。目的使病人在数月之内不发生再感染，以期渡过这段时间后，机体的防御能力会有可能恢复，恶性循环得以中断。
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强迫性用药 compulsive drug use ; compulsive use
预防性用药 prophylactic use of drug ; prophylactic application ; Prophylactic drug use
偶然性用药 circumstantial use
露前预防性用药 PREP
暴露前预防性用药 PREP
合理性用药 Rational drugs use
个性化用药 personalized medication
治疗代谢性疾病用药 Agents Used for Metabolic Diseases
医疗用毒性药品 Medicinal Toxic Drugs
目的了解大学生结核感染者预防性用药情况。
Objective To know the situation of the preventative drugs for tuberculosis infected college students.
目的探讨术前指导与术后预防性用药对整形患者术后疼痛的影响。
Objective To investigate the effect of preoperative directions and postoperative prophylactic analgesia after plastic operation.
对预防性用药的概念和原则作了提示，特别对围手术期用药做了规范限定。
Basic concept and principle of prophylactic use of antibiotics are suggested and perioperative use of antibiotics are particularly restricted.
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