InAmericait’sanepidemic.NownewevidenceraisesconcernabouttheUK’suseofprescriptionopioids.MichaelMosleygoesonanimmersivejourneytoaskwhatcanbedoneaboutit. 　　TheopioidepidemichasdevastatedAmerica.Butwhat’sthesituationhere?AnewreportfromPublicHealthEnglandraisesseriousconcernsaboutBritain'sownrelationshipwithpainkillers.DrMich...