I am so sick. Is it common to have panic attack while coming off of effexor? I had the worst one last night and ended up in the emergency room. I felt sick to my stomach, headache, dizzy, and then had a panic attack. I am just hoping the attack came from being off of the effexor. I weaned from 150-75-37.5 and I quit the 37.5 two days ago. Now today, 2 days later, I had another major panic attack. Plagued with negative thinking, fear, worry. I started Prozac 3 wks ago and it should be in my system working somewhat but I dont' know where all of this anxiety is coming from. I cant see real life anymore when Im feeling like this and I am thinking of anyway to get of out this feeling. I need to know if the effexor could be doing this or if the prozac just isn't working or what. Please help, Ive been trying to get better for 5 months and everytime I think I am coming out of it I get sucked back in. IM SO TIRED!!! My best friend called my psych tonight bc she is worried about me. I dont know how much more I can take.