Ephedrine is a plant alkaloid. Ephedrine is now made synthetically. Ephedrine is a mixed action adrenergic agent. It occurs in various plants and has been used in china for over 2000 years. It was introduced in western medicine approximately 70 years ago as the first orally active sympathomimetics drug. Because Ephedrine is a noncatechol phenylisopropylamine. It has high bilavailibilty and long duration of action. Clinically Ephedrine is utilized when a prolonged duration of action is desired, particularly after oral administration. The main applications are as a nasal decongestant and as a pressor agent.