Reserpine is a medication derived from the Rauwolfia serpentina plant, traditionally used in herbal medicine. It primarily acts as an antihypertensive agent, helping to lower blood pressure by blocking certain neurotransmitters in the brain, particularly norepinephrine and serotonin. In addition to its use for hypertension, reserpine has also been utilized in treating certain psychiatric disorders, such as schizophrenia. However, its use has declined due to the availability of newer medications with fewer side effects. Common side effects of reserpine include sedation, depression, and gastrointestinal issues.