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1. A patient with chronic heart failure is prescribed Digoxin. Which of the following laboratory values should be monitored closely? A) Sodium levels B) Potassium levels C) Calcium levels D) Magnesium levels Answer: B) Potassium levels Rationale: Digoxin has a narrow therapeutic window and is affected by serum potassium levels. Hypokalemia can potentiate digoxin toxicity. 2. Which of the following drugs is an antagonist at N-methyl-D-aspartate (NMDA) receptors and is used in the treatment of Alzheimer's disease? A) Rivastigmine B) Donepezil C) Memantine D) Galantamine Answer: C) Memanti
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