Clenbuterol is a sympathomimetic compound that primarily acts as a selective beta-2 adrenergic receptor agonist. By stimulating beta-2 receptors, it activates pathways involved in smooth muscle relaxation, particularly in the respiratory system, where it produces bronchodilation. Clenbuterol also influences the sympathetic nervous system, increasing thermogenic activity and metabolic stimulation. Its pharmacological effects may include increased heart rate, elevated body temperature, and changes in energy expenditure. Unlike anabolic-androgenic steroids, Clenbuterol does not directly activate androgen receptors or function as a muscle-building steroid. Its use carries significant cardiovascular risks, including tachycardia, palpitations, arrhythmias, blood pressure changes, and electrolyte disturbances.