My doctor just switched me from Wellbutrin XL to Prozac without tapering. So far so good. So it is not that unsual for a straight switch for one to another. Good luck with your change.
__________________
Bipolar I, Depression, GAD Meds: Zoloft, Zyprexa, Ritalin
"Each morning we are born again. What we do today is what matters most." -Buddha