Hi there,
Yes, Depression can have physical symptoms, but that may not be the only thing that is going on here. You do not give a reason for your husband to be reducing his Citalopram, but that reduction can lead to withdrawal and an increase, or return, of original issues:
http://www.rcpsych.ac.uk/healthadvic...x?theme=mobile
This is a highly respected Body over here, their advice is impartial and only meant to benefit the sufferer.
If your husband, or yourself, would like to chat about anything Depression-related, I am always about. We also have an active Concussion/PCS Forum where knowledgeable Members will make you feel welcome.
Dave.