Ephedra refers to several related species of herbs that commonly grow in desert areas. It is best known as a botanical source of the alkaloids ephedrine, pseudoephedrine and others. Ephedra species also contain many other constituents. Ephedra sinica, whose Chinese name is Ma Huang, has been used [...]

Ephedrine is a central nervous system stimulant used to treat breathing problems (as a bronchodilator), nasal congestion (as a decongestant), low blood pressure problems (orthostatic hypotension), or myasthenia gravis.