Match each clinical scenario describing an adverse pharmacological event in a patient being treated for bipolar disorder to the most accurate underlying mechanism of the interaction.
- A 42-year-old man with bipolar I disorder presents to the clinic with severe ataxia, coarse tremors, and confusion. Physical exam shows bilateral horizontal nystagmus. Mental status exam reveals disorientation. He recently started lisinopril and hydrochlorothiazide for hypertension. His serum creatinine is mg/dL (baseline mg/dL).Decreased renal clearance leading to lithium toxicity
- A 24-year-old man with a history of brief, distinct periods of euphoric mood and decreased need for sleep presents to the outpatient clinic with profound sadness and fatigue. He is prescribed paroxetine monotherapy. He returns to the ED two weeks later exhibiting severe agitation, pressured speech, flight of ideas, and grandiosity.Antidepressant-induced manic switch due to unopposed monoamine reuptake inhibition
- A 31-year-old man with bipolar depression presents to the emergency department with a rapidly spreading, painful maculopapular rash and mucosal ulcerations. A novel mood stabilizer was recently initiated at a standard titration dose while he was concurrently maintained on divalproex sodium.Inhibition of glucuronidation increasing lamotrigine levels and risking toxic epidermal necrolysis
- A 28-year-old woman with rapid-cycling bipolar disorder presents to her obstetrician reporting missed menses. She experiences an unintended pregnancy despite perfect adherence to combined oral contraceptives. A new maintenance psychiatric medication was added two months ago.Hepatic CYP450 enzyme induction by carbamazepine causing oral contraceptive failure
- A 35-year-old woman treated with a fixed-dose combination of fluoxetine and olanzapine for acute bipolar depression presents to the ED with altered mental status. Temperature is . Physical exam reveals prominent inducible clonus in the lower extremities and diaphoresis. She recently took over-the-counter dextromethorphan.Synergistic serotonergic activity precipitating serotonin syndrome
Cevap
The correct matches pair each clinical presentation with its specific pharmacokinetic or pharmacodynamic drug interaction mechanism, correctly linking thiazides to lithium toxicity, SSRI monotherapy to manic switch, valproate-lamotrigine to glucuronidation inhibition, carbamazepine to CYP450 induction, and fluoxetine-dextromethorphan to serotonin syndrome.
Each clinical scenario corresponds to a classic, high-yield pharmacological complication encountered in bipolar disorder management. Recognizing these specific medication interactions (CYP450 induction, glucuronidation inhibition, renal clearance changes) is critical for safe prescribing.
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Anahtar Kavram
Pharmacokinetic and pharmacodynamic interactions of mood stabilizers and antipsychotics in the management of bipolar disorder.