Abstract
According to the National Institute on Drug Abuse (NIDA), one of the barriers to research on cannabis is the lack of a standard unit. “Existing experimental data are often hard to interpret due to the wide variability in potency of cannabis plant material and extracts, the lack of standard measures of use, and the wide variety of ways people consume cannabis,” according to a May 10 blog post by NIDA Director Nora Volkow, M.D. To help rectify this, NIDA, along with the National Cancer Institute, the National Heart, Lung, and Blood Institute, and the National Institute of Mental Health, published a notice in the NIH Guide (https://grants.nih.gov/grants/guide/notice‐files/NOT‐DA‐21‐049.html) directing researchers funded by these institutes to measure and report their findings from clinical research on cannabis using a standard unit of delta‐9‐tetrahydrocannabinol (THC) of 5 milligrams.
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