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liaoxin1988

新虫 (初入文坛)

[求助] 请问:消化系统药物H2受体拮抗剂的用法?

1、消化系统药物中有一类胃酸分泌抑制剂H2受体拮抗剂,如雷尼替丁,法莫替丁,一个是饭前吃,一个要求饭后吃,我不明白原因?同一类药用法不同,是因为吸收的原因?还是什么别的原因?
2、抗酸药物如氢氧化铝一般饭前吃,但是铝碳酸镁饭后吃,为什么?
3、磷酸铝凝胶是要求饭后吃,但是他的主要作用是形成膜保护胃壁,其次才是综合胃酸,那为何又要饭后吃?
请教大师们!急!

[ Last edited by liaoxin1988 on 2013-3-21 at 12:12 ]
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