Methylephedrine

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Methylephedrine, sold under the brand name Metheph among others, is a sympathomimetic medication described as an antiasthmatic agent and used to treat coughing and nasal congestion. It is reported to be used in various over-the-counter cough and cold preparations throughout the world, including Japan. The drug is an ephedrine-like sympathomimetic and activates α- and β-adrenergic receptors. Chemically, it is a substituted amphetamine and is closely related to ephedrine. Methylephedrine was discovered by 1927. It is mostly no longer marketed as a prescription drug. The drug is also found naturally as an alkaloid in Ephedra species including Ephedra sinica, Ephedra vulgaris, and Ephedra distachya.