Frequent non-response to histamine H2-receptor antagonists in cirrhotics.

H2 Receptor Antagonists

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Release of histamine by H2-receptor antagonists?

Effects of intracerebroventricular injection of histamine and H1, H2 receptor antagonists on electrocardiographic parameters in broiler chickens

The aim of this study was to assess the effects of exogenous histamine and H1 and H2 central receptorson electrocardiographic (ECG) parameters, heart rate and mean electrical axis in broiler chickens. For thispurpose, Ross broiler chickens (750-800 g weight) received intracerebroventricularly (ICV) histamine.Moreover, to determine the receptors involved in histamine-induced alterations in ECG c...

Histamine H2 receptor trafficking: role of arrestin, dynamin, and clathrin in histamine H2 receptor internalization.

Agonist-induced internalization of G protein-coupled receptors (GPCRs) has been implicated in receptor desensitization, resensitization, and down-regulation. In the present study, we sought to establish whether the histamine H2 receptor (H2r) agonist amthamine, besides promoting receptor desensitization, induced H2r internalization. We further studied the mechanisms involved and its potential r...

Quantitative prediction of the interaction of midazolam and histamine H2 receptor antagonists in rats.

To quantitatively evaluate drug-drug interactions involving metabolic processes in the liver, we attempted to predict the increasing ratio of the plasma concentration of midazolam (MDZ) in the presence of cimetidine (CIM) or nizatidine (NZD) in rats. Under steady-state conditions for the plasma concentration of CIM or NZD, MDZ was administered through the portal vein. The AUC of MDZ in the pres...