As far as the drowsiness stickers and such I wouldn't worry about it if you've never experienced any of those things while on it, and usually they just tell you to take them with food if they are known to be hard on the stomach. Although, if this were the case you probably would have noticed something by now as well. I remember reading something about prolonged exposure to sunlight in the pills I take as well, but I believe that they warn you about that because some pills can cause your skin to be more sensitive to sunlight so that you would burn more easily and such. However, I think that is just one more of those things that CAN happen, but aren't bound to happen for sure.
_________________
"There are things known, and there are things unknown, and in between are the doors of perception."
--Aldous Huxley