A nurse is caring for a client who reports an increase in migraine headaches over the past 2 weeks and asks if sumatriptan might be helpful.
Which of the following conditions from the client's medical history should the nurse recognize as a contraindication for this medication?

Choice A rationale

Bronchospasm is a constriction of the airways, commonly seen in respiratory conditions like asthma. It is mediated by inflammatory responses and smooth muscle contraction in the bronchi. Acetazolamide, a carbonic anhydrase inhibitor, does not typically cause bronchospasm; its primary effects are on fluid and electrolyte balance and intraocular pressure.

Choice B rationale

Constipation is a common gastrointestinal symptom characterized by infrequent or difficult bowel movements. It can be caused by various factors, including dietary habits, medications, and underlying medical conditions. Acetazolamide's mechanism of action, involving inhibition of carbonic anhydrase, does not directly lead to constipation as a significant adverse effect.

Choice C rationale

Diplopia, or double vision, is a visual disturbance where a single object appears as two. It can result from ocular muscle weakness, nerve damage, or other neurological conditions. Acetazolamide's therapeutic effects are on aqueous humor production in the eye to reduce intraocular pressure, but diplopia is not a recognized adverse effect of this medication.

Choice D rationale

Acetazolamide is a carbonic anhydrase inhibitor that promotes the excretion of bicarbonate, sodium, potassium, and water. This diuretic action can lead to metabolic acidosis, hypokalemia (normal range: 3.5-5.0 mEq/L), and hyponatremia (normal range: 135-145 mEq/L) due to increased renal excretion, hence requiring close monitoring of electrolyte balance.

Choice A rationale: The respiratory rate is elevated from 22/min to 34/min, indicating worsening respiratory distress and increased work of breathing. Normal adult respiratory rates range from 12 to 20 breaths per minute. Tachypnea can signify hypoxia, infection progression, or impending respiratory failure, requiring immediate clinical reassessment and possible intervention to maintain adequate oxygenation and ventilation.

Choice B rationale: The blood pressure has dropped from 116/78 mm Hg to 98/62 mm Hg, indicating hypotension. Normal adult BP is around 120/80 mm Hg. This decrease suggests possible sepsis or shock, decreasing organ perfusion. Hypotension combined with other signs of systemic infection warrants urgent evaluation and treatment to prevent multi-organ dysfunction.

Choice C rationale: No incontinence is reported, so this finding is not clinically significant in this scenario. Incontinence can indicate neurological compromise or severe systemic illness but is absent here, making it a non-urgent parameter for follow-up in this context.

Choice D rationale: The client’s temperature remains elevated above normal (39.3°C to 39.4°C). Normal body temperature ranges from 36.5°C to 37.5°C. Persistent fever indicates ongoing infection but is less immediately life-threatening than respiratory or hemodynamic instability, thus not requiring immediate intervention compared to other parameters.

Choice E rationale: The heart rate has increased from 90 to 100 bpm, which is within mild tachycardia range but still within compensatory limits for fever and infection. Normal resting heart rate ranges from 60 to 100 bpm. Though elevated, it is less urgent than hypoxia or hypotension but requires monitoring.

Choice F rationale: The productive cough indicates pulmonary infection but is expected in pneumonia and not an immediate sign of deterioration needing urgent follow-up. The presence of cough aids diagnosis but does not directly indicate acute decompensation.

Choice G rationale: Oxygen saturation decreased from 94% to 86%, which is critically low (normal ≥ 95%). Hypoxemia suggests severe impairment in gas exchange and respiratory failure risk. Immediate oxygen supplementation and further respiratory support are required to prevent tissue hypoxia and organ damage.

Choice H rationale: Restlessness indicates hypoxia or anxiety but is a subjective symptom. While it signals distress, it is less precise than objective measures such as respiratory rate or oxygen saturation for urgent intervention.

Choice I rationale: Diminished lung sounds with crackles reflect pulmonary infection and consolidation but are physical examination findings not requiring immediate change in management compared to vital sign abnormalities indicating acute deterioration.

Choice J rationale: Large erythematous blotches suggest a possible allergic reaction to antibiotic therapy, posing a risk for anaphylaxis. This dermatologic change requires immediate assessment to prevent airway compromise or systemic hypersensitivity reactions, warranting urgent follow-up.