Background:

Ranitidine hydrochloride is a histamine H2-receptor antagonist that inhibits stomach acid production. Target: Histamine H2-ReceptorRanitidine hydrochloride is a histamine H2-receptor antagonist with IC50 of 3.3 ± 1.4 uM. It inhibits stomach acid production. It is also used alongside fexofenadine and other antihistamines for the treatment of skin conditions such as hives. It has 10% the affinity that cimetidine has to CYP450 so it causes fewer side effects, but other H2 blockers famotidine and nizatidine have no CYP450 significant interactions [1, 2].

参考文献:
[1]. Herling, A.W., et al., Inhibition of 14C-aminopyrine accumulation in isolated rabbit gastric glands by the H2-receptor antagonist HOE 760 (TZU-0460). Agents Actions, 1987. 20(1-2): p. 35-9.
[2]. Leucuta, A., et al., A pharmacokinetic interaction study between omeprazole and the H2-receptor antagonist ranitidine. Drug Metabol Drug Interact, 2004. 20(4): p. 273-81.