Keywords: Hydroxyethylpromethazine.svg Skeletal formula of hydroxyethylpromethazine Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 10 0 and Inkscape Own 2007-10-06 Fvasconcellos 17 48 6 October 2007 UTC Anticholinergics H1 receptor antagonists Methyl compounds Phenothiazines Primary alcohols Quaternary ammonium compounds |