I agree with Sue on this one. I don't think the decision to take anti-depressants should be taken lightly, but if you need them, you need them. Talk it over with your doctor and figure out what's best for you. I had to go on Zoloft after my son was born due to problems with post-partum anxiety. I think my issues with PPA were exacerbated by my (undiagnosed at the time) UC flare. Once I got in remission, I was able to taper off quite easily, but Zoloft helped tremendously when I needed it. I'm not sure if I'd have amde it through my diagnosis while caring for a newborn without it.
Status: Remission since May 2009!
Symptoms began in November 2008, ~4 weeks after giving birth to my son
Diagnosed with pancolitis on 1/30/09
Meds: Apriso (4 0.375g pills ONCE!! daily), mesalamine enema twice weekly, Natural Factors Ultimate probiotic 12/12 Formula, OrthoNovum, multivitamin. Used prednisone (starting dose 40 mg) to get into remission.
Thread with links to UC resources and information: