Final answer:
Clenbuterol causes a rapid heartbeat along with fat loss. It stimulates heart rate through the activation of beta-1 adrenergic receptors in the heart and promotes fat loss by activating beta-2 adrenergic receptors in fat cells.
Step-by-step explanation:
The symptoms described in Patient B's case, including weight loss, profuse sweating, increased heart rate, and difficulty sleeping, are consistent with the effects of Clenbuterol. Clenbuterol is a beta-2 adrenergic agonist that is commonly used as a bronchodilator to treat asthma and other respiratory conditions. However, it also has effects on other parts of the body, including stimulating the sympathetic nervous system.
When Clenbuterol activates the sympathetic nervous system, it leads to increased heart rate (tachycardia) due to the stimulation of beta-1 adrenergic receptors in the heart. This can result in a rapid heartbeat.
In addition, Clenbuterol can increase metabolic rate and promote fat loss. This is achieved by stimulating beta-2 adrenergic receptors in fat cells, which activates the breakdown of stored fat (lipolysis).