"i started taking this medication a couple of years ago when i was diagnosed with a chronic illness that seems to be putting me in pain every day.  i did not know if it was a side effect of the medication or my illness that gave me such horrible headaches (not quite a migraine, but pretty close).  i was off the medication for 4 weeks in that time--no headache; but the depression came back.  i got back on it.  the headaches are back now, i don&#039;t have energy, i have to take a nap everyday to function the rest of the day; and the chronic pain persists. "