下列哪个半衰期时,每天给药一次比较方便
t1/2<30min
30min<t1/2<8h
8h<t1/2<24h
t1/2>12h
t1/2=28h
当半衰期大于24小时,每天给药1次较为方便,可提高患者对医嘱的依从性。如果需要立即达到治疗浓度,可首剂加倍。