I just looked up the side effects of the new antiseizure medication I'm starting. (Almost always a big mistake, but I did it anyway.) I looked at the Mayo Clinic website, so it was a reputable website.
First, the thing that made me afraid: The Mayo Clinic website, divides side effects into two groups: First those you need to contact your doctor for immediately, then those that will probably go away and you need to contact your doctor if they become problematic. Each of these two groups is subdivided into three subgroups: Common, less common, and rare. Side effects in each subgroup are listed alphabetically. Which meant that the first side effect I encountered when I looked at the list was "blindness"! WTF? (I don't know if I've ever said on here, but going blind is something I'm particularly afraid of.)
Second, the thing that made me laugh: The side effects to contact your doctor about immediately included "tiredness." The side effects to contact your doctor about only if they don't go away and become problematic include "sleepiness" and "drowsiness." I think I understand what they're trying to differentiate here, but only after sitting and thinking it over for a bit, and even so it still has an element of "WTF?" about it.