nalmefene
Low frequency (medical/specialist term)Technical/Medical
Definition
Meaning
A medication used to reverse the effects of opioid overdose and to treat alcohol dependence.
A pure opioid antagonist that works by blocking opioid receptors in the brain, preventing both the euphoric and sedative effects of opioids; also used as a harm-reduction treatment for alcohol use disorder by reducing craving.
Linguistics
Semantic Notes
The term is primarily used in pharmacology, addiction medicine, and emergency medicine. It belongs to a class of drugs called opioid antagonists, similar to naloxone but with different pharmacokinetics (longer duration of action).
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage between British and American English. Both variants use the same pharmaceutical name.
Connotations
Neutral medical/scientific term in both variants.
Frequency
Equally low frequency in both variants, appearing primarily in medical literature and clinical settings.
Vocabulary
Collocations
Grammar
Valency Patterns
Nalmefene is used to treat [condition]Administer nalmefene [route of administration]Nalmefene blocks [receptor type]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None (technical term)”
Usage
Context Usage
Business
Rarely used; appears only in pharmaceutical industry reports or marketing materials.
Academic
Common in medical, pharmacological, and neuroscience research papers.
Everyday
Virtually never used in casual conversation.
Technical
Standard term in medical charts, emergency protocols, addiction treatment guidelines, and pharmacology texts.
Examples
By Part of Speech
verb
British English
- The paramedic will nalmefene the patient immediately.
- We need to nalmefene him before respiratory arrest sets in.
American English
- The ER doctor decided to nalmefene the overdose victim.
- They had to nalmefene her twice due to the fentanyl potency.
adverb
British English
- The drug acted nalmefene-like, blocking receptors within minutes.
- He responded nalmefene-quickly after administration.
American English
- She recovered nalmefene-fast once the antagonist was given.
- The receptor binding occurs nalmefene-specifically.
adjective
British English
- The nalmefene injection was kept in the emergency kit.
- She received nalmefene therapy for alcohol dependence.
American English
- The nalmefene dose needs to be calculated by weight.
- He's on a nalmefene regimen as part of his recovery program.
Examples
By CEFR Level
- This medicine helps people who take too much strong pain medicine.
- The doctor gave nalmefene to stop the effects of the drug overdose.
- Nalmefene is an opioid antagonist commonly used in emergency settings to reverse overdoses.
- Pharmacologically, nalmefene competes with opioids for binding at the mu-opioid receptor, thereby attenuating both the euphoric and respiratory depressant effects.
Learning
Memory Aids
Mnemonic
Think 'NAL' (like naloxone, its cousin drug) + 'MEFENE' (sounds like 'medicine' for 'fending' off overdose).
Conceptual Metaphor
BLOCKING AGENT (nalmefene blocks receptors like a plug blocks a drain).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing with 'налмефен' (phonetic transliteration) and assuming it has a Russian root—it's an international nonproprietary name (INN).
- Do not translate components ('nal-' + 'mefene') separately; it's a single coined pharmaceutical term.
Common Mistakes
- Mispronouncing as 'nal-meh-feen' instead of 'NAL-muh-feen'.
- Confusing with naloxone (shorter acting).
- Using in non-medical contexts where simpler terms like 'overdose reversal drug' would be clearer.
Practice
Quiz
What is the primary clinical use of nalmefene?
FAQ
Frequently Asked Questions
No, they are both opioid antagonists, but nalmefene has a longer duration of action and different chemical structure.
Yes, it is approved in some countries to reduce alcohol consumption by decreasing craving and the rewarding effects of drinking.
Typically no; it is a prescription medication, though in some regions take-home kits for emergency overdose reversal may be distributed.
It can be given by intramuscular injection, intravenous injection, or as an intranasal spray, depending on the formulation and setting.