[refurb]

If you've ever looked at clinical trial data, you can see the list of symptoms reported in the placebo arm. It's actually quite interesting. These patient received no drug, but will complain about a whole list of symptoms.

As a result, drugs with very few side effects will still have a list of "this drug may cause" that aren't drug related at all.

However, the FDA still requires those to be listed. In such lists you often see contradictory side effects like constipation and diarrhea, sleepiness and nervousness and non-specific complaints.