naltrexone
LowTechnical/Medical
Definition
Meaning
A prescription medication that blocks the effects of opioids (like heroin, morphine, and oxycodone) and reduces cravings for alcohol.
A synthetic opioid antagonist used primarily in medical treatment to manage opioid dependence and alcohol use disorder, often as part of a comprehensive treatment programme.
Linguistics
Semantic Notes
Term is used almost exclusively within medical, pharmacological, and addiction treatment contexts. It is a proprietary name that has become a generic term for the drug.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent. The brand name ReVia is/was used in both markets.
Connotations
Neutral medical term in both varieties. Associated with addiction medicine and recovery.
Frequency
Equally low frequency in both UK and US English, confined to specialist fields.
Vocabulary
Collocations
Grammar
Valency Patterns
The doctor prescribed [Patient] naltrexone.[Patient] is on naltrexone.Naltrexone is used to treat [Condition].Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used in general business contexts. May appear in pharmaceutical company reports or healthcare investment discussions.
Academic
Used in medical, pharmacological, psychiatry, and public health research papers and textbooks.
Everyday
Rarely used in everyday conversation unless discussing personal/family medical treatment for addiction.
Technical
Core term in addiction medicine, pharmacology, and clinical psychiatry. Precise dosing and administration protocols are key.
Examples
By Part of Speech
verb
British English
- The consultant decided to naltrexone the patient as part of the detox protocol. (rare/technical)
American English
- The physician will naltrexone the client prior to discharge. (rare/technical)
adjective
British English
- The naltrexone implant procedure requires minor surgery.
American English
- She experienced a naltrexone-induced blockage of opioid effects.
Examples
By CEFR Level
- The doctor gave him medicine called naltrexone to help him stop drinking.
- Naltrexone is often prescribed to reduce cravings in patients recovering from alcohol dependence.
- The efficacy of extended-release naltrexone implants versus daily oral tablets is a subject of ongoing clinical research in addiction medicine.
Learning
Memory Aids
Mnemonic
Think: NAL- (like 'NARC' for narcotic) + TREX (sounds like 'blocks' or 't-rex' stopping something) + ONE (a single treatment). 'The one that blocks narcotics'.
Conceptual Metaphor
A BLOCKADE or SHIELD against cravings and the effects of opioids/alcohol.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'налоксон' (naloxone), another opioid antagonist used for emergency overdose reversal.
- Direct transliteration 'налтрексон' is standard. It is not a descriptive term in Russian either.
Common Mistakes
- Misspelling as 'nalaxone', 'naltrexon', or 'naltrexine'.
- Confusing it with methadone or buprenorphine (which are opioid agonists/partial agonists).
- Using it as a general term for any addiction medication.
Practice
Quiz
What is the primary pharmacological action of naltrexone?
FAQ
Frequently Asked Questions
No, naltrexone is not addictive. It is an antagonist, not an agonist, so it does not produce a 'high' or euphoria.
No, it is the opposite of a painkiller. It blocks the effects of opioid pain relievers and would prevent them from working.
It is a protocol for using naltrexone to treat alcohol use disorder, where the medication is taken one hour before drinking to gradually reduce the desire for alcohol.
Methadone is an opioid agonist that activates receptors to prevent withdrawal and craving. Naltrexone is an antagonist that blocks receptors entirely, making opioid use ineffective.