Pain, fear and several other stressors can cause secretion of epinephrine (adrenaline). Treatment usually involves adrenaline (epinephrine), antihistamines, and corticosteroids. In severe reactions injectable adrenaline (epinephrine) is recommended. Hence the fatigue, stress, emotion, adrenaline, etc. Men are particularly vulnerable since the virus stimulates testosterone and adrenaline production. Chloroacetic acid is converted to chloroacetyl chloride, a precursor to adrenaline (epinephrine). People want something that gives them an adrenaline rush. This plan may include giving adrenaline (epinephrine) and wearing medical alert jewelry. I watched the film with an adrenaline rush. The history of adrenaline and epinephrine is reviewed by Rao. Approximately 20% noradrenaline (norepinephrine) and 80% adrenaline (epinephrine) are secreted here. The major emotion studied in relation to adrenaline is fear. This response is triggered by the release of adrenaline into the bloodstream. It's a rush of adrenaline, it's chemical. One physiological stimulus to adrenaline secretion is exercise.