Ephedrine

Ephedrine (or EPH) is an alkaloid found in plants of the genus Ephedra. It can also be found in other plants like wolfsbane or the Euopean yew. 
Uses.
Ephedrine has effects on the human body. It can be used as a stimulant or a decongestant. It is also used to treat certain forms of low blood pressure or to help hunger. Ephedrine is like amphetamine and methamphetamine.
The herb "má huáng" (麻黄, "Ephedra sinica") is used in traditional Chinese medicine. It has ephedrine and pseudoephedrine in it. Nagayoshi Nagai was the first person to take ephedrine from "Ephedra vulgaris" in 1885. The substance called soma, mentioned in old Hindu books such as the Rig Veda, may have been ephedra extract. 
Ephedrine is sometimes used for doping, usually together with caffeine and salicylic acid.There have been lots of controversies related to ephedrine. 
The production of ephedrine in China has become a multi-million dollar industry. Companies extract $13 million worth of ephedrine from 30,000 tons of ephedra per year, 10 times the amount that is used in traditional Chinese medicine.