Antidepressant tolerance/poop out

[Sprat72]

I've had really good success with antidepressants for my agoraphobia (Seroxat, Citalopram) but the only problem is, after about 3 years on them, I tend to develop tolerance (or poop-out as it's commonly called). This usually entails having to change to another AD, which may, or may not work. My psych has added in an anti-psychotic (risperidone) this time which is definitely helping, but I'm curious as to how many other people out there have had the same problem?

Thanks
Sprat