Question 68

Serotonin syndrome may result from a drug-drug interaction between mirtazapine and buspirone.

Mirtazapine, an antidepressant, and buspirone, an anxiolytic, can interact to increase serotonin levels, potentially leading to serotonin syndrome, a serious condition characterized by excessive serotonin activity.

A) Mirtazapine and buspirone

Mirtazapine and buspirone are both known to influence serotonin levels in the brain. When used together, they can enhance serotoninergic neurotransmission, leading to an increased risk of serotonin syndrome, which is marked by symptoms such as confusion, agitation, and neuromuscular abnormalities.

B) Montelukast and brimonidine

Montelukast is a leukotriene receptor antagonist used primarily for asthma and allergies, while brimonidine is an alpha-2 adrenergic agonist used to treat glaucoma. There is no known interaction between these two medications that affects serotonin levels, thus they do not contribute to the risk of serotonin syndrome.

C) Mupirocin and betamethasone

Mupirocin is a topical antibiotic, and betamethasone is a corticosteroid used to reduce inflammation. Since neither medication impacts serotonin levels, their combination does not pose a risk of serotonin syndrome.

D) Meloxicam and bisoprolol

Meloxicam is a nonsteroidal anti-inflammatory drug (NSAID), and bisoprolol is a beta-blocker used for hypertension and heart conditions. These medications do not interact with serotonin pathways, and thus do not lead to serotonin syndrome.

Conclusion

The interaction between mirtazapine and buspirone highlights the importance of monitoring for serotonin syndrome when these drugs are prescribed together. In contrast, the other options fail to present any known interactions that would affect serotonin levels, confirming that they do not pose the same risk. Understanding these interactions is crucial for safe medication management.