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.

    • ‘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.’
    • ‘Substances like phentermine and other drugs, such as ephedrine, are hidden in many supplements that the players don't know about.’
    • ‘If the medicines aspirin, ephedrine, and morphine were once botanicals, how did they get to be tested and marketed as drugs?’
    • ‘In the 1960s, drug therapy was limited to potassium iodide and ephedrine.’


Late 19th century: from ephedra + -ine.