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ephedrine Syllabification: e·phed·rine
Pronunciation: /əˈfedrən/

Definition of ephedrine in English:


A crystalline alkaloid drug obtained from some ephedras. It causes constriction of the blood vessels and widening of the bronchial passages and is used to relieve asthma and hay fever.
  • Alternative name: 1-phenyl-2-methylaminopropanol; chemical formula: C10H15NO
Example sentences
  • He studied the tissue distribution and metabolism of caffeine, amphetamines, ephedrine, and narcotic drugs.
  • A 43 year old general practitioner had had juvenile asthma requiring regular ephedrine.
  • If the medicines aspirin, ephedrine, and morphine were once botanicals, how did they get to be tested and marketed as drugs?


Late 19th century: from ephedra + -ine4.

Definition of ephedrine in:
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