Promethazine performs on histamine-one (H1) receptors. H1 receptors are current within the bronchial tubes and within the circulatory system. The attachment of histamine to these receptors results in bronchoconstriction and increased vascular permeability, which leads to plasma leakage. Talk to a physician or pharmacist just before using other cough or https://ciceroo888lev8.bmswiki.com/user