Adrenergic drugs, also called as sympathomimetic drugs, are the medication used to stimulate the sympathetic nervous system located in several parts of the body such as the chest and lower back region of the spinal cord. These drugs stimulate the chemical messenger epinephrine and norepinephrine from the adrenal gland, or replicate the action of these chemical messengers. These drugs are utilized to increase the breathing rate, heartbeat, sweating, urine flow, and prevent bleeding. Adrenergic drugs have diverse applications in the treatment of several life-threatening conditions such as chronic obstructive pulmonary diseases (COPD), asthma, cardiac arrest, shock, and allergic reactions. Bronchodilators, vasopressors, and cardiac stimulators are the three major types of adrenergic drugs, with each having different applications in treating a variety of disease indications.