chlorphenamine + ranitidine

Chlorphenamine + ranitidine is a pharmacological combination of an H1-receptor antagonist and an H2-receptor antagonist used as research tools in mechanistic clinical studies. Specifically, this combination was utilized by the University of Edinburgh in a human forearm blood flow model to investigate the etiology of anaphylactoid reactions associated with N-acetylcysteine (NAC) administration during the treatment of paracetamol overdose. By blocking both classes of histamine receptors, researchers aimed to determine if NAC-induced vasodilatation is mediated by dose-dependent histamine release. The study also explored whether paracetamol itself provides a protective effect against these vascular adverse events. This combination is not a commercial product but serves as a pharmacological tool to understand drug-induced pseudo-allergic syndromes.

Other names

chlorpheniramine + ranitidine