I've done that before.
What I do is just not take it. Since I take the 37.5 mg tablets, I can always split it in half and take 1/2 by 2 or 3 p.m. if I'm feeling overly hungry by then (meaning I probably just forgot it in the a.m.)
I've heard that some people are actually prescribed 2 pills per day, so I don't think taking an extra 1/2 pill could be hazardous -- UNLESS YOU HAVE OTHER MEDICAL PROBLEMS, SUCH AS HIGH BLOOD PRESSURE, etc.
I would check with your doctor or pharmacist just to be sure. Even if it's not dangerous, you could be up all night if you take two.
Good luck!
