3 syllables: Ep, he, drine. Stress on he.
if-ED-rin
/ɪˈfɛdɹɪn/
Ephedrine is pronounced if-ED-rin (/ɪˈfɛdɹɪn/). It has three syllables (Ep-he-drine), with the stress on "he". Ephedrine is a sympathomimetic amine used as a decongestant and stimulant. It has a historically important role in treating bronchial asthma and hypotension, though its use is restricted in many regions. Pronounced with two primary syllables and a clear stress on the first: /ˌɛf.ɪˈdriːn/ or /ˈɛf.ə.driːn/, depending on dialect.
nounEphedrine is a sympathomimetic amine used as a decongestant and stimulant. It has a historically important role in treating bronchial asthma and hypotension, though its use is restricted in many regions. Pronounced with two primary syllables and a clear stress on the first: /ˌɛf.ɪˈdriːn/ or /ˈɛf.ə.driːn/, depending on dialect.
"The physician prescribed ephedrine to manage severe hypotension during anesthesia."
"Ephedrine is banned or tightly regulated in many sports and supplement markets."
"She asked for a non-prescription alternative to ephedrine for nasal congestion."
Pronounce as eh-FED-rin? No—actually /ˌɛf.ɪˈdriːn/ with primary stress on the third syllable: eh-FEH-dreen (British/US standard US /ˌɛf.ɪˈdriːn/). Start with /ˈɛ/ as in “bet,” follow with /f/ and a light /ɪ/ before the stressed /ˈdriːn/. You’ll want the /d/ in a crisp stop, then a long /iːn/ at the end. In IPA: US/UK: /ˌɛf.ɪˈdriːn/. Australian often shifts slightly toward /ˌɛf.əˈdriːn/ with a schwa before the final stressed syllable. Audio reference: consult medical pronunciation resources or Forvo entries for “ephedrine.”
Two frequent errors: misplacing stress and mispronouncing the ending. People often stress the first or second syllable instead of the third, saying /ˈɛf.ɪˈdriːn/. Also, ending as /ˈef.hedrɪn/ or /ˈef.ədrin/ with a flat final vowel. Correct by emphasizing the /driːn/ cluster and ensuring a long /iː/ before the final nasal, with a crisp /d/ and no extra syllables.”
In US and UK, primary stress on the third syllable with /ˌɛf.ɪˈdriːn/. The US can be slightly flatter, ending with a clearer /iːn/. Australian often inserts a small /ə/ before the final stressed vowel, sounding /ˌɛf.əˈdriːn/. Rhoticity does not drastically alter the word itself, but vowel quality and the reduction in the second syllable can vary. Pronunciation resources show the same root vowels but with dialectal nuance in vowel length and quality.
The difficulty centers on two issues: syllable balance and the final /iːn/ sequence. The middle /d/ needs to be clearly released before the long /iːn/, which can tilt into a diphthong or be shortened in rapid speech. Also, some speakers tense the second syllable and reduce it, making /ˈɛf.ɪ.driːn/ unclear. Focus on keeping the /d/ crisp and maintaining the long /iː/ before the final nasal to avoid ambiguity.
A common nuance asks whether the prefix 'ep-' in ephedrine is pronounced with a short /e/ or a schwa. In standard English medical usage, it's /ˌɛf.ɪˈdriːn/ with schwa-like /ɪ/ in the second syllable and not a full /eɪ/. The first syllable carries /ˈɛ/ as in ‘bet’. The important detail is keeping the /f/ adjacent to a relaxed /ɪ/ and then landing the stress on /driːn/. This prevents confusion with similarly-spelled compounds and ensures clarity in medical dictation.
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Ephedrine derives from the plant genus Ephedra, from the Greek ephêdrion meaning ‘a plant used in medicine.’ The compound was first isolated in 1885 by chemist Nagai Nagayoshi in Japan from Ephedra vulgaris, a Chinese herb long used in traditional medicine. The name reflects both the botanical source (Ephedra) and the chemical class (-ine, a common suffix for amines). In early pharmacology, ephedrine described a specific alkaloid with indirect sympathomimetic effects. Over time, synthetic analogs emerged, expanding therapeutic use and regulatory scrutiny. The word’s first known uses appear in 19th- and early 20th-century pharmaceutical literature, evolving in parallel with the broader discovery of plant-derived alkaloids and the later development of decongestants and stimulant medications. Ephedrine’s pronunciation has remained stable across languages that borrowed the term, though transliterations vary in stress and vowel quality across American, British, and Australian English. This linguistic path mirrors medical history’s shifts from herbal extracts to standardized, regulated compounds.” ,
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Words that rhyme with "Ephedrine"
-ine sounds
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