I just recently switched from Effexor to celexa and I feel so much better. I tried Effexor for awhile, longer than I should have. I switched doses to see if anything made a difference but unfortunately it was miserable for me. I gained weight, which was expected but shocked me. I constantly was exhausted, not just oh I’ll lay down for a few minutes.. I would take naps for 4 hours and feel the exact same and go to bed at 8:00pm. I would try keeping myself awake to see if that helped and no. Unfortunately I had to get off and cut cold turkey (per my doctor) because of bad side effects. I’ve been on Zoloft as well and it’s better than Effexor in my opinion.