ve probably heard is that Prozac, because it stays in the body a fairly long time while the other ssris, particularly Paxil, leave the body very quickly, is thought not to have as bad a withdrawal problem so some psychiatrists, after tapering your
Paxil dosage down, will try to substitute Prozac so as to take you off the Prozac rather than the Paxil. Whether this works or not is very individual. Either way, you'll have to start a slow taper off Paxil first.