Source:http://linkedlifedata.com/resource/umls/id/C0005508
MSH: The extent to which the active ingredient of a drug dosage form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action.,NCI: The rate and extent to which the active ingredient or active moiety is absorbed from a drug product and becomes available at the site of action. For drug products that are not intended to be absorbed into the bloodstream, bioavailability may be assessed by measurements intended to reflect the rate and extent to which the active ingredient or active moiety becomes available at the site of action (21CFR320.1).,CHV: the amount of drug that reaches the blood after it has been administered,CHV: the amount of drug that reaches the blood after it has been administered