这个词是什么意思？
Drugs that selectively bind to but do not activate histamine H2 receptors, thereby blocking the actions of histamine. Their clinically most important action is the inhibition of acid secretion in the treatment of gastrointestinal ulcers. Smooth muscle may also be affected. Some drugs in this class have strong effects in the central nervous system, but these actions are not well understood.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D006635 · MeSH 2026。
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