Some people may experience somnolence/fatigue, anorexia, anxiety, agitation, difficulty concentrating, confusion, migraine, and even have episode of amnesia. Other side effects include rashes,
sexual dysfunction, abdominal pain, tremor, paresthesias, nausa, and sweating.
The inability to move is concerning. Did you have an MRI performed of your cervical spine? Are you still symptomatic from this? Are you still taking citalopram?