Can Fam Physician. 1991 Jan;37:120-4.
The elderly tolerate smaller doses of most drugs, largely because changes in body fat content, water content, and muscle mass often lead to higher blood levels than in a young person of the same weight. Moreover, diminished renal blood flow and creatinine clearance decrease excretion of agents cleared by the kidney. This leads to an increased number of drug reactions and interactions and consequent hospital admissions.
老年人对大多数药物的耐受剂量较小,主要是因为体内脂肪含量、水分含量和肌肉质量的变化往往导致血液水平高于相同体重的年轻人。此外,肾血流量和肌酐清除率降低会减少通过肾脏清除的药物的排泄。这导致药物反应和相互作用的增加,进而导致住院。