阿托品是干啥用的?谢谢了,大神帮忙啊

2025-02-11 05:22:28
推荐回答(3个)
回答1:

下面就阿托品给你介绍一下相关知识,希望会对你有所帮助。 【分子式成分】化学名:α-(羟甲基)苯乙酸8-甲基-8-氮杂双环[3,2,1>-3-辛酯硫酸盐一水合物。分子式:(17H23NO3)2˙H2SO4˙H2O。分子量:694.84。 【制剂规格】片剂:0.3mg;纸型片:0.3mg。 【药理毒理】抑制受体节后胆碱能神经支配的平滑肌与腺体活动,并根据本品剂量大小,有刺激或抑制中枢神经系统作用。解毒系在M胆碱受体部位拮抗胆碱酯酶抑制剂的作用,如增加气管、支气管系粘液腺与唾液腺的分泌,支气管平滑肌挛缩,以及植物神经节受刺激后的亢进。此外,阿托品能兴奋或抑制中枢神经系统,具有一定的剂量依赖性。对心脏、肠和支气管平滑肌作用比其他颠茄生物碱更强而持久。 【药动学】本品易从胃肠道及其他粘膜吸收。也可从眼或少量从皮肤吸收。口服1小时后即达峰效应,T1/2为3.7~4.3小时。血浆蛋白结合率为14~22%,分布容积为1.7L/kg,可迅速分布于全身组织,可透过血脑屏障,也能通过胎盘。一次剂量的一半经肝代谢,其余半数以原形经肾排出。在包括乳汁在内的各种分泌物中都有微量出现。 【适应证】1)各种内脏绞痛,如胃肠绞痛及膀胱刺激症状。对胆绞痛、肾绞痛的疗效较差;2)迷走神经过度兴奋所致的窦房阻滞、房室阻滞等缓慢型心失常,也可用于继发于窦房结功能低下而出现的室性异位节;3)解救有机磷酸酯类中毒。 【不良反应】不同剂量所致的不良反应大致如下:0.5mg,轻微心率减慢,略有口干及少汗;1mg,口干、心率加速、瞳孔轻度扩大;2mg,心悸、显著口干、瞳孔扩大,有时出现视物模糊;5mg,上述症状加重,并有语言不清、烦躁不安、皮肤干燥发热、小便困难、肠蠕动减少;10mg以上,上述症状更重,脉状更重,脉速而弱,中枢兴奋现象严重呼吸加快加深,出现谵妄、幻觉、惊厥等;严重中毒时可由中枢兴奋转入抑制,产生昏迷和呼吸麻痹等。最低致死剂量成人约为80~130mg,儿童为10mg。发烧、速脉、腹泻和老年人慎用。 【相互作用】(1)与尿碱化药包括含镁或钙的制酸药、碳酸酐酶抑制药、碳酸氢钠、枸橼酸盐等伍用时,阿托品排泄延迟,作用时间和(或)毒性增加。 (2)与金刚烷胺、吩噻嗪类药、其他抗胆碱药、扑米酮、普鲁卡因胺、三环类抗抑郁药伍用,阿托品的毒副反应可加剧。 (3)与单胺氧化酶抑制剂(包括呋喃唑酮、丙卡巴肼等)伍用时,可加强抗M胆碱作用的副作用。 (4)与甲氧氯普胺并用时,后者的促进肠胃运动作用可被拮抗。 【用法用量】口服:0.3~0.6mg,3次/d,极量每次1mg,3mg/d;皮下、肌肉或静脉注射;每次0.5~1mg,极量每次2mg。

回答2:

阿托品的临床应用: 1.解除平滑肌痉挛:用于各种内脏绞痛,能使胃肠道绞痛迅速缓解。 2.抑制腺体分泌:用于减少全身麻醉时呼吸道腺体的分泌,还可用于制止盗汗和治疗流涎。 3.解救有机磷中毒 4.眼科:(1)虹膜睫状体炎 (2)眼底检查 (3)验光 5.抗休克 6.用于缓慢型心律失常

回答3:

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