https://www.sciencedaily.com/releases/2018/05/180523150007.htm

The paper, "On the Marketing and Use of Pharmacogenetic Tests for Psychiatric Treatment," comes at a time when a growing industry is vigorously marketing Pgen tests by claiming their results can improve the outcomes of patients with psychiatric disorders. According to the paper, one company website reported having already sold over 650,000 Pgen tests, with an estimated cost of $1 billion in genotyping and related clinical services.

As noted by Zubenko, the first author of the paper, "While the promise of Pgen-guided medication treatment of psychiatric disorders is appealing and supports the popular narrative of personalized/precision medicine, available evidence suggests that Pgen testing will not contribute much to improving care, if at all. And, in some cases, it could provide misleading information."