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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. [ 3 ] [ 4 ] [ 1 ] It is reported to be used in various over-the-counter cough and cold preparations throughout the world, including Japan .
For example, between 2010 and 2018, outputs of chemicals and their products in Indonesia, Malaysia, the Philippines, Singapore, Thailand, and Vietnam, increased in value by nearly 40 per cent from US$132 billion to US$181 billion. [5] Examples of such precursors and drugs made with them are listed below.
In 1988, the United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances introduced detailed provisions and requirements relating the control of precursors used to produce drugs of abuse.
This page was last edited on 8 December 2023, at 22:36 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
This page was last edited on 15 November 2018, at 11:01 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
It is a derivative of pseudoephedrine and an isomer of N-methylephedrine. It is present in ephedra. [2] In organic chemistry, it is used in asymmetric synthesis. [1]
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Chelate complex of the Chen-Kao reaction starting from (1S,2S)-pseudoephedrine. The Chen-Kao reaction (named after Ko Kuei Chen and Chung-Hsi Kao, Madison, Wisconsin 1926) [1] [2] is a chemical method for determining the presence of pseudoephedrine, ephedrine, and similar phenylalkylamines. [3]