<unk>  <unk>  is a sympathomimetic amine similar in structure to the synthetic derivatives amphetamine and methamphetamine.<unk>  is commonly used as a stimulant, appetite suppressant, concentration aid, decongestant and to treat hypotension associated with regional anaesthesia. Chemically, it is an alkaloid derived from various plants in the genus<unk> edra (family<unk> edraceae). It is most usually marketed in the hydrochloride and sulfate forms.
In traditional Chinese medicines, the herb ma huang <unk> edra sinica) contains<unk>  and pseudoephedrine as its principal active constituents. The same is true of other herbal products containing extracts from<unk> edra species. Nagayoshi Nagai was the first one to isolate<unk>  from<unk> edra vulgaris in 1885. The substance called soma mentioned in old Hindu books such as the Rig Veda, may have been<unk> edra extract.
The production of<unk>  in China has become a multi-million dollar export industry. Companies producing for export extract US$13 million worth of<unk>  from 30,000 tons of<unk> edra annually, 10 times the amount that is used in traditional Chinese medicine.
Ephedrine
N-Methylephedrine
Methoxyphedrine
Naloxone
Butalbital
Bethanechol chloride
Cimetropium bromide
Esketamine