Actually, in all likelihood some patients would still be feeling awful (if not more) in that scenario because some withdrawal effects would still be bleeding through while the initial side effects of the new one are still being worked out, depending on which neurotransmitters are affected for each of the two medications.

I've heard of some patients experiencing this under normal clinical situations when cross-tapering and switching to other SSRI's.

Actually, in all likelihood some patients would still be feeling awful (if not more) in that scenario because some withdrawal effects would still be bleeding through while the initial side effects of the new one are still being worked through, depending on which neurotransmitters are affected.

I've heard of some patients experiencing this under normal clinical situations when cross-tapering and switching to other SSRI's.