Epinephrine can be stimulated both physiologically and pharmacologically. When you need to stimulate adrenaline, it should be done under the guidance of doctors to avoid unauthorized use of drugs and adverse reactions. 1. Physiological stimulation: When people are subjected to strong stimulation, the body will increase the amount of adrenaline secretion to respond to external stimuli. 2. Pharmacological stimulation: adrenaline injection and norepinephrine injection can stimulate the secretion of adrenaline. If a person has an epinephrine deficiency, medications should be used under the supervision of a doctor. When people are deficient in adrenaline, they may experience symptoms such as depression, difficulty breathing, loss of appetite, nausea, and other discomforts. When people experience these symptoms, they should seek medical treatment promptly.