The gut has its own nervous system: https://en.wikipedia.org/wiki/Enteric_nervous_system https://en.wikipedia.org/wiki/Enteric_nervous_system . Usually the effe

The gut has its own nervous system: https://en.wikipedia.org/wiki/Enteric_nervous_system https://en.wikipedia.org/wiki/Enteric_nervous_system . Usually the effects of antidepressants on the gut are considered an unwanted side-effect, but in your case it was the intended effect.