Plasma epinephrine analysis using high-performance liquid chromatography (HPLC) is a laboratory test designed to measure epinephrine levels in the blood serum. Epinephrine is a hormone and neurotransmitter secreted by the adrenal glands in response to stress and tension, playing a key role in regulating vital body functions such as heart rate and blood pressure. High-performance liquid chromatography is used to accurately determine epinephrine concentration, allowing assessment of the body’s response to environmental and internal stressors. This analysis is important for diagnosing various health conditions, including adrenal gland disorders such as excessive epinephrine secretion and certain tumor cases. The test results help understand an individual’s overall health and guide appropriate treatment decisions, making it a valuable tool in modern healthcare.