常用血管紧张素受体拮抗剂解析

2022-09-06 网络 网络

血管紧张素受体拮抗剂(ARB)在高血压治疗中有着重要的地位。ARB 类药物的品种繁多,常以「沙坦」命名,其看似大同小异,但却各有不同。

血管紧张素受体拮抗剂(ARB)在高血压治疗中有着重要的地位。ARB 类药物的品种繁多,常以「沙坦」命名,其看似大同小异,但却各有不同。

ARB类药物的适应证及指南推荐 

几种沙坦类药物都是安全有效的降压药,但是适应证及指南推荐方面稍有差异。 

除降压外,厄贝沙坦还批准用于高血压合并 2 糖尿病肾病的治疗,替米沙坦还用于年龄 55 岁及以上,存在发生严重心血管事件高风险且不能接受 ACEI 治疗的患者,以降低其发生心肌梗死卒中或心血管疾病导致死亡的风险。

ARB 类药物在心衰领域,目前指南中推荐了有明确试验证据的坎地沙坦酯、缬沙坦、氯沙坦;高血压伴高尿酸血症指南推荐首选氯沙坦。 

不同ARB类药物与 AT1 受体的亲和力及降压幅度 

• 可逆结合:氯沙坦、阿利沙坦酯

• 部分可逆结合:缬沙坦、厄贝沙坦

• 不可逆结合:坎地沙坦酯、替米沙坦、奥美沙坦酯

• 不同沙坦类药物与 AT1 受体的结合位点不同、亲和力不同,从而导致他们在降压疗效上的不同。

• 从单药的降压能力来看,大致可作如下排序:奥美沙坦 > 替米沙坦 > 厄贝沙坦 > 坎地沙坦 > 缬沙坦 > 氯沙坦、阿利沙坦酯(注:这只是大致的排序,不同病情患者对药物有不同需求,不能单纯依此序列选药)。

ARB类药物的半衰期 

大多数的 ARB 类药物具有相似的半衰期,且降压作用可持续较长时间,因此可以每日 1 次给药。 

其中替米沙坦的半衰期最长,长达 24 h,偶尔漏服一次对血压影响较小;氯沙坦半衰期虽然只有 2 h,但约有 14% 的氯沙坦会代谢为活性代谢产物 E3174E3174 的半衰期约为 10 h;阿利沙坦酯与氯沙坦代谢后产生的活性代谢产物相同为 E3174,所以半衰期也为 10 h 

ARB类药物的药代动力学性质

代谢方面

大部分沙坦类药物通过肝肾双通道代谢;

替米沙坦几乎全部经过肝脏清除,因此替米沙坦在轻、中度肝脏功能损害患者中每日剂量不超过 40 mg

氯沙坦的活性代谢产物 E3174E3174 AT1 受体的亲和力是氯沙坦的 1540 倍,氯沙坦的降压作用是氯沙坦和 E3174 共同作用的结果,且以后者为主;

阿利沙坦酯与氯沙坦代谢后产生的活性代谢产物 E3174 相同。区别在于阿利沙坦酯不经过肝脏代谢,而是经胃肠道吸收后,可在体内被水解酯酶水解为活性代谢产物物 E3174 而起作用,可显著降低高血压患者的肝脏负担; 

缬沙坦、替米沙坦、奥美沙坦、阿利沙坦酯, 不经细胞色素 P450 同工酶代谢,因而与经该酶系代谢的药物相互作用很小。 

吸收方面

缬沙坦、氯沙坦、奥美沙坦酯的生物利用度较低;厄贝沙坦和阿利沙坦酯的生物利用度较高。替米沙坦绝对生物利用度呈剂量依赖性。 

大部分沙坦类药物吸收不受食物影响:缬沙坦进食时服用,使药时曲线下面积(AUC)减少 48%,但是无论是否进食时服用,8 h 后的血药浓度相似。AUC 减少对临床疗效无明显影响,故可以进餐时或空腹服用;食物会降低阿利沙坦酯的吸收,建议不与食物同服。

ARB类药物的特点总结 

• 氯沙坦:降压幅度不高,可以降低尿酸,对于高血压合并高尿酸血症患者适宜;高血压合并慢性心力衰竭;此药含钾,对于高钾人群不适宜。

• 厄贝沙坦:降压幅度较大,更容易使血压达标。口服吸收好,生物利用度高,国家批准用于治疗高血压合并 2 型糖尿病肾病的患者。

• 坎地沙坦酯:降压强度不低于氯沙坦和缬沙坦,高血压合并慢性心力衰竭者适宜。

• 奥美沙坦酯:降压效果最强,肝肾功能不全者不需要调整剂量。

• 替米沙坦:半衰期最长,降压效果强,主要是重度高血压患者使用。除降压外,具有保护心血管的效果,适合高血压伴心血管疾病或者存在心血管事件高风险的患者服用。

• 阿利沙坦酯:我国新研发的降压药,适用于轻中度原发性高血压;和氯沙坦一样可以降尿酸,不经过肝脏代谢,减轻了肝脏的负担。

 

总的来说,ARB 类药物各有优势,高血压患者可根据自身的情况进行选择。需要注意的是,不论服用哪种降压药,都需要做好血压监测,定期复查,预防药物副作用或者高血压并发症的发生。

 

参考文献:

1】《中国高血压防治指南》修订委员会. 中国高血压防治指南 2018 年修订版 [J]. 心脑血管病防治, 2019, 019(001):1-44.

2】中华医学会心血管病学分会心力衰竭学组, 中国医师协会心力衰竭专业委员会, 中华心血管病杂志编辑委员会. 中国心力衰竭诊断和治疗指南 2018[J]. 中华心力衰竭和心肌病杂志, 2018, 2(4):30.

3】中华医学会内分泌学分会. 中国高尿酸血症与痛风诊疗指南 (2019)[J]. 中华内分泌代谢杂志, 2020, 036(001):1-13.

4】童荣生等. 药物比较与临床合理选择-心血管疾病分册 [M]. 北京: 人民卫生出版社,2013:23-35,107-109,182

5】高血压患者药物治疗管理路径编写委员会. 高血压患者药物治疗管理路径专家共识 [J]. 临床药物治疗杂志, 2022, 20(1):4.

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    2023-04-26 hongbochen
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    2022-09-06 forvalen

    有些说法和之前了解的略有不同

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1673026, encodeId=358816e30267b, content=<a href='/topic/show?id=b79b910345c' target=_blank style='color:#2F92EE;'>#解析#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=46, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=91034, encryptionId=b79b910345c, topicName=解析)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f42d26916490, createdName=hongbochen, createdTime=Wed Apr 26 04:23:35 CST 2023, time=2023-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1511819, encodeId=22a4151181948, content=<a href='/topic/show?id=90d75628960' target=_blank style='color:#2F92EE;'>#拮抗剂#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=56289, encryptionId=90d75628960, topicName=拮抗剂)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=474c10379153, createdName=ms5236388012055669, createdTime=Thu Sep 08 07:23:35 CST 2022, time=2022-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1589376, encodeId=fff915893e6be, content=<a href='/topic/show?id=fb0389e4373' target=_blank style='color:#2F92EE;'>#血管紧张素#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=89743, encryptionId=fb0389e4373, topicName=血管紧张素)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=5ce517702394, createdName=xiongliangxl, createdTime=Thu Sep 08 07:23:35 CST 2022, time=2022-09-08, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1247530, encodeId=8017124e53021, content=有些说法和之前了解的略有不同, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210512/b39c8bc0ab334969ba4ccc08e7a6cd94/c4e41798ef27449aa31ad740c9b13062.jpg, createdBy=5ff35133022, createdName=forvalen, createdTime=Tue Sep 06 19:40:25 CST 2022, time=2022-09-06, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1247560, encodeId=0c64124e56060, content=终于明白了沙坦类药物的药理作用不同。学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=05155126416, createdName=146480bem82暂无昵称, createdTime=Tue Sep 06 21:56:03 CST 2022, time=2022-09-06, status=1, ipAttribution=)]
    2022-09-06 146480bem82暂无昵称

    终于明白了沙坦类药物的药理作用不同。学习了

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