Xylitol toxicosis and serotonin-like syndrome occurring simultaneously in a dog secondary to ingestion of Natrol 5-HTP Fast Dissolve Tablets.

Xylitol and serotonergic compounds are included in the manufacture of numerous over-the-counter products. Both compounds have been documented to cause toxicosis in dogs. This report details the first case of simultaneous xylitol toxicosis and serotonin-like syndrome in a dog, secondary to ingestion of a single over-the-counter product.