Celexa gave me severe muscle pain in my arms, back, and legs. I stuck with it for 6 weeks but finally had to get off of it after going to the emergency room twice due to the pain I was in. Never had headaches. I wasn't really sure it was the celexa but I asked by P to change me to wellbutrin xr and all these muscle aches went away so I am sure it was the celexa. The wellbutrin works great for me but everyone is different.