I am having extreme muscle tightness in neck, knees, back of legs and biceps, four weeks now since slow discontinuation of celexa after taking this med just shy of two months. I am usually good from noon until early evening after taking Excedrin migraine and acetaminophen in the morning. But, it sure is hard getting up and down and it sounds like there is cellophane in the lower base of my head. I read the prescription printout and it sounds like serotonon syndrome. How long will this last and what should I do? Going back to my primary care physician is not an option. Thank you.