Ephedra sinica is a plant species native to China, commonly known as Ma Huang. It belongs to the Ephedraceae family and is characterized by its jointed stems and small, scale-like leaves. Traditionally, it has been used in Chinese medicine for its stimulant properties and to treat respiratory conditions. The plant contains active compounds called alkaloids, particularly ephedrine and pseudoephedrine, which can increase heart rate and blood pressure. Due to these effects, Ephedra sinica has been used in various herbal supplements, but its use is regulated in many countries due to safety concerns and potential side effects.