hard drug
US /ˌhɑːrd ˈdrʌɡ/
UK /ˌhɑːrd ˈdrʌɡ/

1.
droga pesante
an illegal drug that is addictive and seriously harmful, such as heroin or cocaine
:
•
The police seized a large quantity of hard drugs during the raid.
La polizia ha sequestrato una grande quantità di droghe pesanti durante il raid.
•
He was arrested for dealing hard drugs.
È stato arrestato per spaccio di droghe pesanti.