Ephedrine is a medication and stimulant that is commonly used to treat conditions like asthma and bronchitis. It works by relaxing the muscles in the airways, making it easier to breathe. Additionally, it can increase heart rate and blood pressure, which is why it is sometimes used in emergency situations to treat low blood pressure. Originally derived from the Ephedra plant, ephedrine has a long history of use in traditional medicine. However, it is also associated with potential side effects, including increased heart rate, anxiety, and insomnia. Due to these risks, its use is regulated in many countries.