Ephedrine (noun)

1. A central nervous system stimulant and decongestant used in the treatment of various conditions, such as asthma and nasal congestion.
2. A type of alkaloid that is obtained from the Ephedra plant and used as a stimulant, decongestant, and appetite suppressant.

Origin:

Named after the plant genus ephedra, from which it is derived.

Examples:

1. Ephedrine is often used in over-the-counter cold and flu medications to help relieve nasal congestion.
2. The doctor prescribed ephedrine to the patient to help her breathing during the asthma attack.
3. Ephedrine was banned as a dietary supplement due to its adverse effects and potential for abuse.
4. The weightlifter took ephedrine to enhance his performance and suppress his appetite.
5. Ephedrine has been used for centuries in traditional Chinese medicine to treat a variety of conditions.