The drug (https://en.wikipedia.org/wiki/Prucalopride https://en.wikipedia.org/wiki/Prucalopride) targets serotonin receptors which appear in the intestines and

The drug (https://en.wikipedia.org/wiki/Prucalopride https://en.wikipedia.org/wiki/Prucalopride) targets serotonin receptors which appear in the intestines and bladder, but also the central nervous system and thalamus. No surprise it has wider effects then?