what classification of drugs are zantac
CLINICAL PHARMACOLOGY. ZANTAC (ranitidine hcl) is a competitive, reversible inhibitor of the action of histamine at the histamine H 2 -receptors, including receptors on the gastric cells. ZANTAC (ranitidine hcl) does not lower serum Ca++ in hypercalcemic states. ZANTAC (ranitidine hcl) is not an anticholinergic agent.