A patient with depression is prescribed sertraline 50 mg once daily. If the medication is administered for 14 days, what is the total dosage in milligrams?
700 mg.
500 mg.
750 mg.
600 mg.
The Correct Answer is A
Choice A reason: The patient is prescribed 50 mg of sertraline daily for 14 days. The total dosage is calculated as 50 mg/day × 14 days = 700 mg, making this the correct answer.
Choice B reason: A total of 500 mg would imply a daily dose of approximately 35.7 mg (500 ÷ 14), which does not match the prescribed 50 mg daily dose. This is incorrect.
Choice C reason: A total of 750 mg would imply a daily dose of approximately 53.6 mg (750 ÷ 14), which exceeds the prescribed 50 mg daily dose. This is incorrect.
Choice D reason: A total of 600 mg would imply a daily dose of approximately 42.9 mg (600 ÷ 14), which is less than the prescribed 50 mg daily dose. This is incorrect.
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Related Questions
Correct Answer is B
Explanation
Choice A reason: Three tablets would equal 750 mg, which exceeds the prescribed 500 mg dose and could lead to overdose.
Choice B reason: Two tablets of 250 mg each equal the prescribed 500 mg dose, making this the correct answer.
Choice C reason: One tablet would equal 250 mg, which is only half the prescribed daily dose and would be ineffective.
Choice D reason: Four tablets would equal 1,000 mg, which is double the prescribed dose and could be toxic.
Correct Answer is A
Explanation
Choice A reason: Monitoring lithium levels is essential because of its narrow therapeutic index; toxicity can occur if levels rise slightly above the therapeutic range.
Choice B reason: Weight gain is not an indication of lithium toxicity; instead, toxicity signs include tremors, nausea, diarrhea, and confusion.
Choice C reason: Lithium is not addictive, and therapy is often long-term to prevent relapse of mood episodes.
Choice D reason: Diuretics are contraindicated with lithium because they increase the risk of toxicity by altering sodium and fluid balance.
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