title: Variations in gastrointestinal functions influencing the absorption of drugs.
mesh_terms: D000818:Animals; D004285:Dogs; D005260:Female; D005750:Gastric Juice / Q000032:analysis; D005753:Gastric Mucosa / Q000502:physiology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007275:Injections, Intravenous; D007408:Intestinal Absorption; D008297:Male; D009539:Nicotinic Acids / Q000378:metabolism; D009661:Nortriptyline / Q000378:metabolism; D010404:Penicillin V / Q000378:metabolism; D010477:Perfusion; D013997:Time Factors; D014316:Tritium
chemical_list: D009539:Nicotinic Acids; D014316:Tritium; D009661:Nortriptyline; D010404:Penicillin V