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Drugs and the liver. Part III: Ageing of the liver and the metabolism of drugs
Author(s) -
Woodhouse Ken
Publication year - 1992
Publication title -
biopharmaceutics and drug disposition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.419
H-Index - 58
eISSN - 1099-081X
pISSN - 0142-2782
DOI - 10.1002/bdd.2510130502
Subject(s) - ageing , drug metabolism , drug , pharmacology , metabolism , medicine , population , physiology , environmental health
Abstract The clearance of many drugs by the liver is reduced in the elderly, and this accounts, at least in part, for the greater frequency of adverse drug reactions in this population. Ageing in experimental animals is accompanied by a decline in the activities of certain microsomal monooxygenase enzymes; this has been said to be the reason for decreased drug elimination. However, recent data suggests that this is probably not the case in humans. Reduced size and blood flow are important features of the ageing liver, and probably account for most of the age‐related changes in drug metabolism. Major decrements in hepatic function do occur in frail elderly individuals, although the mechanisms underlying this are at present unclear. Future studies of drug metabolism and ageing must carefully define patient groups to allow full interpretation of data.