Englishopiate
noun
six of the patients used an opiate during the radiotherapy:
drug, narcotic, mind-altering drug, sedative, tranquillizer, depressant, sleeping pill, soporific, anaesthetic, painkiller, analgesic, anodyne;
barbiturate, bromide, morphine, opium, laudanum;
Medicine calmative, palliative, stupefacient;
informal dope, downer;
literary nepenthes;
dated sleeping draught.
opiate Oxford Dictionary of English