Ace inhibitors can increase blood levels of which compounds?

• A. Calcium and Sodium
• B. Copper and Magnesium
• C. Creatine Kinase and Potassium
• D. Chloride and Phosphate

Answer: (C)

Angiotensin-converting enzyme (ACE) inhibitors primarily function by lowering blood pressure and improving cardiovascular outcomes by inhibiting the conversion of angiotensin I to angiotensin II, a strong vasoconstrictor. One of the common side effects associated with the use of ACE inhibitors is the retention of potassium. This occurs because angiotensin II plays a significant role in the regulation of aldosterone, which promotes sodium reabsorption and potassium excretion in the kidneys. When ACE inhibitors reduce the levels of angiotensin II, there is a consequent decrease in aldosterone secretion, leading to diminished potassium excretion and higher levels of potassium in the blood.

In addition to this effect on potassium, ACE inhibitors can also influence creatine kinase levels, particularly in conditions of muscle stress or injury. Elevated creatine kinase levels can occur in response to certain medications, muscle damage, or other underlying conditions.

Thus, the association of ACE inhibitors with increased blood levels of creatine kinase and potassium highlights their pharmacological effects on electrolyte balance and renal function, making this the correct answer regarding the compounds whose levels may rise due to ACE inhibitor therapy.