What is a common effect of serotonin syndrome linked to drug interactions?

Serotonin syndrome is a potentially life-threatening condition that occurs due to an excessive accumulation of serotonin in the central nervous system, typically as a result of drug interactions that increase serotonin levels. Seizures are considered a common effect of serotonin syndrome because the elevated serotonin levels can lead to hyperexcitable neuronal activity, which can trigger neurological manifestations such as seizures.

This condition often arises from the use of multiple medications that affect serotonin, such as SSRIs, MAOIs, and certain pain medications or recreational drugs. In severe cases, seizures can be a significant complication of the syndrome, indicating the need for immediate medical intervention.

The other choices listed, while they can occur in various medical conditions, are not direct or common effects of serotonin syndrome. Muscle spasms may occur but are not considered a hallmark symptom, and dehydration and constipation are not typical features associated with serotonin syndrome.