Is epinephrine a steroid

Adrenaline is produced by the adrenal glands, which sit on top of either kidney. The hormone, more commonly called epinephrine in the scientific and medical communities, is also often called the "fight or flight" hormone, since it's released in response to severe stress or threat. Explains Dr. Lauralee Sherwood in her book "Human Physiology," adrenaline increases heart rate, respiration rate, availability of glucose to fuel muscles, and blood flow to the muscles, helping to prepare the body to fight or flee an attack.

Because both testosterone and adrenaline are associated with strength and vigor in some regard--testosterone because it leads to increased musculature and adrenaline because it increases the contractile strength of muscles temporarily--it's common to assume that the hormones work together. In reality, testosterone is a steroid hormone that exerts long-term effects over development and physiological function. Adrenaline, on the other hand, has short-term effects, and does not show cooperation with testosterone.