A pregnant client is receiving magnesium sulfate therapy for the control of preeclampsia. A nurse discovers that the client is encountering toxicity from the medication in which of the following assessments?

Correct Answer: A

Rationale: Magnesium sulfate toxicity can cause respiratory depression, which is indicated by a respiratory rate of 10 breaths per minute or less. This is a life-threatening complication requiring immediate intervention. Deep tendon reflexes are typically absent in severe toxicity, not present. A urine output of 25 ml/hr may indicate renal impairment but is not specific to magnesium toxicity. A serum magnesium level of 7 mEq/L is elevated but does not alone confirm toxicity without clinical symptoms. Therefore, respiratory depression is the key indicator.

Correct Answer: C

Rationale: All calcium channel blockers (CCBs) like verapamil and nifedipine are orally active, so that's false. Half-lives vary (e.g., nifedipine ~2-5 hours, diltiazem longer), not uniformly 8-12 hours, making that false. They block L-type voltage-gated calcium channels, reducing vascular and cardiac contractility, a true statement. They relax bronchiolar smooth muscle, not unaffected, so that's false. Dihydropyridines cause reflex tachycardia, not bradycardia. The L-type blockade is their unifying mechanism, key to antihypertensive and antianginal effects.

Correct Answer: D

Rationale: Androgen therapy, typically testosterone, aims to increase libido and treat erectile dysfunction in men with hypogonadism, restoring sexual drive. Decreasing libido opposes its intent. It doesn't release FSH or increase LH-exogenous testosterone suppresses these via feedback. Boosting libido corrects deficiency symptoms, improving quality of life, a primary clinical goal.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Seizure drugs (e.g., benzodiazepines like clonazepam) treat anxiety via GABA enhancement, calming overactivity, per pharmacology. Antitussives suppress cough, anticoagulants thin blood, and antibiotics fight infection-none target anxiety. Seizure drugs' anxiolytic use is established, fitting the need.