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Any of various compounds that bind to specific receptors in the central nervous system and have analgesic and narcotic effects, including naturally occurring substances such as morphine; synthetic and semisynthetic drugs such as methadone and oxycodone; and certain peptides produced by the body, such as endorphins. Also called opiate.

o′pi·oid′ adj.


a. any of a group of substances that resemble morphine in their physiological or pharmacological effects, esp in their pain-relieving properties
b. (modifier) of or relating to such substances: opioid receptor; opioid analgesic.


(ˈoʊ piˌɔɪd)

1. any opiumlike substance, as the endorphins produced by the body or the synthetic compound methadone.
2. pertaining to such a substance.


adj & n opioide m
References in periodicals archive ?
Act 139 permits an individual in a position to assist a person at risk of opiod overdose to obtain and administer naloxone.
to be wary "She said: "There has been a serious problem in the last 10 years or so in the increase in opiod use.
abstinent users 4 years after admission for heroin detoxification at the Opiod Detoxification Unit at Stikland Hospital Active users Abstinent users p-value Age, years (mean 28(5.
The only thing that reduced her pain was opiod painkillers, but they caused her to experience fatigue and fuzzy thinking.
The possible antinociceptive mechanism of action of rhodiola was also investigated by administering rhodiola (81mg/kg) 15 minutes before flumazenil (a GABAa/BDZ receptor antagonist), WAY100635 (a 5-HT1A serotonin receptor antagonist) or naltrexone (an opiod receptor antagonist).
WORCESTER -- Training in the risks of opiod abuse was embedded in the curriculum of MCPHS University well before state officials started warning of an opiod addiction epidemic earlier this year.
They now argue, as the Belgian doctors claim, "There is no clear ethical distinction between withholding/withdrawing [life] supportive therapy and increasing doses of sedative/ opiod substances in patients in whom further treatment is no longer considered beneficial.
Respondents with comorbid musculoskeletal or endocrine conditions had higher levels of pain and differed from the general population in lower usage of opiod pain medications.
Similarly the hospitals entertaining cancer patients would directly import opiod drugs which may not be available in Pakistan in order to ease the suffering of cancer patients.
Other opiod drugs can be addictive and cause more harm than good in the long run.
Summary: Three men have been jailed after tests revealed that they had been using heroin, with the prime suspect being slapped with an extra year for possession of the illegal opiod.
Trends in Opiod Prescribing by Race/Ethnicity for Patients Seeking Care in US Emergency Care Departments, 299 J.