I started taking celexa five days ago after going to my doctor for a f/u and completely breaking down bawling like a baby (my mom was just diagnosed with acute leukemia). On day two, I developed a severe headache and very stiff neck. I have had migraines in the past that originate in my neck/shoulder area. So, I thought I was getting a migraine like I've had in the past...I started doing all the things that have worked to relieve the pain before (massage, advil, heat, ice, rest, etc.) but, nothing worked. By day three, I started looking on-line to see if this could be a reaction to the medicine. On day five, I was exhausted. I decided to bring out the big guns...muscle relaxer and 1 percocet...Still no relief! Finally, I took my Maxalt and low and behold the pain started to ease. I fell asleep thinking "Yes! Finally, the pain will be gone". I woke up from my nap and I'll be damned if my neck isn't just as stiff as before and my head is pounding. WTF! Is this a reaction to the Celexa?? How much longer will it take before the side effects go away?