Pregabalin (Lyrica®) for generalized anxiety disorder (GAD) with partial response to a serotonergic antidepressant?

Since partial response to an SSRI or SNRI is common in GAD, an obvious question is whether we could consider adding pregabalin in a patient who has taken an SSRI or an SNRI and has had partial benefit.  There is not a lot of research on this specific question. But, there is at least one published randomized controlled clinical…