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Ephedrine works by inducing the release of norepinephrine and hence indirectly activating the α-and β-adrenergic receptors. [11] Chemically, ephedrine is a substituted amphetamine and is the (1R,2S)-enantiomer of β-hydroxy-N-methylamphetamine. [14] Ephedrine was first isolated in 1885 and came into commercial use in 1926.
The result is that the dextrorotary d-pseudoephedrine is wrongly named D-pseudoephedrine and the levorotary l-ephedrine (the diastereomer) wrongly L-ephedrine. The IUPAC names of the two enantiomers are (1 S ,2 S )- respectively (1 R ,2 R )-2-methylamino-1-phenylpropan-1-ol.
The Ephedra alkaloids, ephedrine and pseudoephedrine – constituents of E. sinica and other members of the genus – have sympathomimetic and decongestant qualities, [22] and have been used as dietary supplements, mainly for weight loss. [23] The drug ephedrine is used to prevent low blood pressure during spinal anesthesia. [22]
A wide variety of alkaloid and non-alkaloid compounds have been identified in various species of Ephedra.Of the six ephedrine-type ingredients found in ephedra (at concentrations of 0.02-3.4%), the most common are ephedrine and pseudoephedrine, [13] which are the sources of its stimulant and thermogenic effects. [4]
Ephedra was used 5000 years ago in China as a medicinal plant; its active ingredients are alkaloids ephedrine, pseudoephedrine, norephedrine (phenylpropanolamine) and norpseudoephedrine . Natives of Yemen and Ethiopia have a long tradition of chewing khat leaves to achieve a stimulating effect. The active substances of khat are cathinone and ...
Illicit methamphetamine is more commonly made by the reduction of ephedrine or pseudoephedrine, which produces the more active d-methamphetamine isomer. The maximum conversion rate for ephedrine and pseudoephedrine is 92%, although typically, illicit methamphetamine laboratories convert at a rate of 50% to 75%. [104]
English: This is the molecular structure of pseudoephedrine presented in a way which makes it easy to compare to the image currently displayed on the page for ephedrine. Date 28 October 2018
Ephedrine. Ephedrine, a stereoisomer of pseudoephedrine, acts as a direct and indirect sympathomimetic amine. Its indirect mechanism makes it more unique than other sympathomimetic agents, for example, pseudoephedrine and phenylephrine. [9] It directly binds to both alpha and beta receptors.