Administer opiates to Administer opiates to antonyms If you know antonyms for Administer opiates to, then you can share it. Suggest antonym for Administer opiates to Administer opiates to synonyms dope sedate drug administer drugs to administer narcotics to tranquillize give a sedative to put under sedation calm down quieten pacify Full list of synonyms (15)