Well, narcotic wasn't in the text but they use 'roesmiddelen'. I don't know the exact translation but the online translater (not always right, I know) .
NL: roesmiddelen, narcotica, verdovende middelen, psycholeptica, hypnotica
EN: narcotic, narcotic analgesics
Definitie: (Engels) Drug which produces several effects,primarily analgesia but also narcosis(state of stupor or sleep),addiction(physical dependence),and side effects.
So alcohol is also a narcotic (but other drugs also )...
Google simply translates it with 'drugs'...