I was on Citalopram for 5 months when I started twitching, a side effect of the drug. My brother had epilepsy as a child. I got off the medication because it was so disturbing. I am still having twitching at night; it is impossible to sleep on my right side. I also am having bouts of headaches. I had three weeks of headache before getting of the medicine, and sporadic headaches now. Something I have not had for years, however, I am living in a new climate where allergies are rampant.