Active or passive transport carries drug from intestine to portal vein {absorption, drug}.
Compounds absorbed from intestine {human intestinal absorption} (HIA) go to portal vein.
Intestines have contents travel rate {motility}.
Acidic or neutral drugs can diffuse across GI-tract lipid membrane, but basic drugs cannot diffuse {pH partition theory}.
Drug goes from intestine to portal vein {predicted fraction of human absorption} (Fa). Fraction is in percent.
5-Chemistry-Biochemistry-Drug-Mechanics
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Date Modified: 2022.0225