What is a common side effect of furosemide?

Furosemide, a loop diuretic, is commonly associated with hypokalemia, which refers to a deficiency of potassium in the bloodstream. This occurs because loop diuretics like furosemide inhibit sodium and chloride reabsorption in the loop of Henle within the kidneys. As a result, there is increased renal excretion of not only sodium and chloride but also potassium. Monitoring potassium levels is crucial when administering furosemide, as significant drops can lead to serious cardiovascular and muscular complications, highlighting the importance of potassium regulation in patients taking this medication.

Other options, while they may present challenges in various clinical contexts, do not typically arise as common side effects specifically linked to furosemide usage. Weight gain, bradycardia, and insomnia are not direct effects of furosemide and are generally less frequently observed in patients being treated with this medication.