Correct Answer: B

Rationale: When a client is prescribed methylprednisolone, a corticosteroid, the nurse should monitor for weight gain as a potential side effect. Corticosteroids like methylprednisolone can cause weight gain and fluid retention due to their impact on metabolism and sodium retention.

Correct Answer: C

Rationale: The correct instruction for a client prescribed methotrexate is to avoid sunlight while taking this medication. Methotrexate can increase sensitivity to sunlight, leading to skin reactions, so clients should limit sun exposure and use protective measures like sunscreen and clothing coverage to prevent adverse effects.

Correct Answer: A

Rationale: The correct instruction the practical nurse should provide to the client regarding phenytoin is to take the medication at the same time every day. This consistency helps maintain a steady level of the medication in the bloodstream, which is crucial for effectively managing seizures. It is important for clients to adhere to their prescribed dosing schedule to optimize the therapeutic benefits of phenytoin.

Correct Answer: A

Rationale: Furosemide is a loop diuretic that inhibits the reabsorption of sodium and chloride in the kidneys, leading to increased potassium excretion and potentially causing hypokalemia. Hypokalemia can lead to cardiac irregularities, making it crucial for the practical nurse to monitor the client for this electrolyte imbalance.

Correct Answer: A

Rationale: The correct potential side effect of citalopram is nausea. Citalopram can cause gastrointestinal disturbances such as nausea, so clients should be advised to take the medication with food if nausea occurs to help minimize this side effect. While other side effects like drowsiness, insomnia, and headache may also occur with citalopram, nausea is a common side effect that clients should be informed about.