I've just been prescribed Citalopram HBR (generic for Celexa), 20 mg, to treat my anxiety disorder. I've been taking Effexor for about 7 months but started experiencing random nervous stomach that might have been caused by the Effexor, so I've been switched to Celexa. I haven't taken it yet, I'm starting tomorrow, I was wondering if anyone taking this medication for anxiety would share their experience?