What makes you sure it's the venlafaxine after 3 years? I'm stating the obvious here, but speak to your doctor if you haven't already. You could always try switching to another antidepressant to see if that makes a difference. Good luck. GI symptoms can be pretty miserable, so I hope you can resolve it.
Dx Crohn's in June 2000. (Yay )
Tried: 5-ASAs, azathioprine, 6MP, Remicade, methotrexate, Humira, diets.
1st surgery 20/2/13 - subtotal colectomy with end ileostomy.
2nd surgery 10/7/15 - ileorectal anastomosis. Stoma reversed and ileum connected to the rectum.
Current status: Chronic flare. Do I have any other kind?
Current meds: 50mg 6MP; Entyvio (started 3/11/16)