• andre hæmmere af det centrale nervesystem, andre opioidderivater (f. eks. metadon, analgetika og hostestillende midler), visse antidepressiva, sederende H1- receptor antagonister, barbiturater, anxiolytika udover benzodiazepiner, neuroleptika, klonidin og relaterede stoffer:
• other central nervous system depressants, other opioid derivatives (e. g. methadone, analgesics and antitussives), certain antidepressants, sedative H1-receptor antagonists, barbiturates, anxiolytics other than benzodiazepines, neuroleptics, clonidine and related substances: these combinations increase central nervous system depression.