Promethazine is effective on histamine-one (H1) receptors. H1 receptors are present in the bronchial tubes and within the circulatory procedure. The attachment of histamine to those receptors will cause bronchoconstriction and increased vascular permeability, which ends up in plasma leakage. Due to inconsistencies between the drug labels on DailyMed and https://erasmusc322xoe2.wikipublicist.com/user