- One can hear it everywhere. Exercise is supposed to make you feel better. Not in my case. We are talking about physical symptoms (anxious feeling in belly, sleep maintenance insomnia), not wrong thought patterns. Before treated with Luvox it used to cause 9-hour long panic attacks at night. NAC as adjunctive therapy helps a lot too, coupled with Abilify. I am simply curious about mechanism of action. What is going on here?