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See also: éphédrine
- (Received Pronunciation) IPA(key): /ˈɛf.ə.dɹiːn/
- (General American) IPA(key): /ɪˈfɛ.dɹɪn/, /ˈɛf.ə.dɹɪn/
Audio (general American) (file)
- (biochemistry, pharmacology) A crystalline alkaloid drug C10H15NO obtained from a Chinese ephedra (Ephedra sinica) or synthesized that has the physiological action of epinephrine. It causes constriction of the blood vessels and widening of the bronchial passages and is used in the form of its hydrochloride or sulfate to relieve asthma and hay fever.