ingredients:  Codeine ? http://www.psdh.gov.hk/eps/productDetailAction.do?id=3785  (HK-03785; GLAXOSMITHKLINE LIMITED) Physical State: White Small Tablet ACTIFED: a  registered trademark  for a combination  antihistamine  and  nasal decongestant  medication used for  cold  and  allergy  symptoms ----------------------------------------------------------------------------------------------------------- Codeine IUPAC Name: (5α,6α)-7,8-didehydro-4,5-epoxy-3-methoxy-17-methylmorphinan-6-ol Chemical Formula: C18H21NO3 Medical Usage: Codeine is considered a  prodrug , since it is metabolised  in vivo  to