SSRI/SNRI Cross-Taper, increased risk for serotonin syndrome?

Just wondering, because I came across some discussions on patients that were on Cymbalta/Effexor, and due to no efficacy, was decided to be switched to a SSRI. Also pain docs who want to switch a patient off SNRI... But as we know, at higher doses of Effexor (>100 mg), less serotonin reuptake, and more on the Norepi reuptake. So if you do a cross-taper, e.g, tapering at 225 mg Effexor, starting 20 mg Prozac, is there a heightened risk of serotonin syndrome? Should you first taper off the... SSRI/SNRI Cross-Taper, increased risk for serotonin syndrome?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums