An analysis of FDA-approved drugs for pain and anesthesia. – PubMed – NCBI by Michael Kinch · Published February 1, 2016 · Updated February 1, 2016 Drug Discov Today. 2015 Jan;20(1):3-6. doi: 10.1016/j.drudis.2014.09.002. Epub 2014 Sep 15. Source: An analysis of FDA-approved drugs for pain and anesthesia. – PubMed – NCBI