Promethazine operates on histamine-one (H1) receptors. H1 receptors are current in the bronchial tubes and within the circulatory system. The attachment of histamine to these receptors results in bronchoconstriction and elevated vascular permeability, which results in plasma leakage. For preoperative medication, young children need doses of 0.five mg for each https://omarw244gfy1.blogsuperapp.com/profile