Express Scripts Holding Co. does not yet endorse the use of pharmacogenomic testing in areas where the value proposition is not clear, such as for the oncologic tamoxifen or the anti-clotting drugs warfarin or Bristol-Myers Squibb Co.’s Plavix (clopidogrel), according to the pharmacy benefit manager’s recently released 2011 Drug Trend Report.
“The evidence to support them is sparse (or even negative),” the PBM maintains. Express Scripts says it recommends its health...