Atypical Antidepressants: Bupropion and Mirtazapine
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Questions and Answers

What is the primary mechanism of action of bupropion?

  • Antagonism of central presynaptic alpha2 adrenergic receptors
  • Inhibition of monoamine oxidase
  • Inhibition of serotonin reuptake
  • Weak inhibition of norepinephrine and dopamine reuptake (correct)

Which receptor antagonism is responsible for the sedative effects of mirtazapine?

  • 5-HT2 receptor antagonism
  • 5-HT3 receptor antagonism
  • Histamine (H1) receptor antagonism (correct)
  • Alpha2 adrenergic receptor antagonism

What percentage of an orally administered dose of bupropion reaches systemic circulation?

  • 50-80%
  • 20-50%
  • 5-20% (correct)
  • 80-100%

Which of the following is an active metabolite of bupropion?

<p>Hydroxybupropion (B)</p> Signup and view all the answers

What is the primary route of excretion for bupropion metabolites?

<p>Urine (87%) (D)</p> Signup and view all the answers

What is the approximate protein binding of mirtazapine during distribution?

<p>80-90% (A)</p> Signup and view all the answers

What is the primary reason bupropion is contraindicated in patients with a seizure disorder?

<p>It can increase the risk of seizures (C)</p> Signup and view all the answers

Which enzyme is primarily responsible for the metabolism of mirtazapine?

<p>CYP2D6 (B)</p> Signup and view all the answers

What is the most common adverse effect experienced by patients taking mirtazapine?

<p>Drowsiness (C)</p> Signup and view all the answers

Why should patients who abruptly stop taking their antiseizure medication avoid being prescribed bupropion?

<p>It could exacerbate seizure risk (D)</p> Signup and view all the answers

Which condition is a known contraindication for bupropion use?

<p>Current or prior diagnosis of bulimia (C)</p> Signup and view all the answers

What is the recommended starting dose of bupropion for Major Depressive Disorder (MDD)?

<p>$100 mg twice a day (B)</p> Signup and view all the answers

Why is mirtazapine contraindicated within 14 days of taking MAOIs?

<p>Potential hypertensive crisis (D)</p> Signup and view all the answers

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