Does pregabalin (Lyrica®) work for generalized anxiety disorder (GAD)?

Even though pregabalin (brand name Lyrica®) is not FDA-approved for the treatment of any mental disorder (and never will be), many randomized, placebo-controlled studies have evaluated whether it works for generalized anxiety disorder (GAD). Does it work? When many randomized, controlled clinical trials have been done to evaluate something, it is not feasible to read all…