MY SON HAS TAKEN CITALOPRAM AND IS OFF OF IT NOW. HE HAS HAD WHAT HE BELIEVES IS A SYNDROME THAT SOME PEOPLE SUFFER AFTER GOING OFF OF IT. HE HAS FOUND (SEVERAL MONTHS LATER) THAT TAKING THERA FLU RELIEVES HIS FEELING VERY SICK, HEADACHES MIGRAINES ETC. CAN THIS BE FROM THE DEXTROMETHORPHAN 10 MG? WE CAN'T FIGURE IT OUT, SO I LOOKED UP THE INDIVIDUAL INGREDIENTS . THE EFFECTS OF GOING OFF THE CITALOPRAM HAVE BEEN TRULY DEBILITATING, BUT THE DRUG WAS CAUSING PROBLEMS .