In 1995, there were more than two times as many women as men in the US age 85 and ewer group.3 Women are expected to continue to outnumber men in all age categories. Data from the United Nations4 show that, the life expectancy for women is greater in virtually all developed and developing countries, suggesting that most elderly populations will have Inhibitors,research,lifescience,medical some degree of female majority. Medications are an integral part of the clinical management of the health problems of older individuals.

In developed countries, drugs from virtually every therapeutic class, including antibiotics, cardiovascular, psychotropics, and antiinflammatory drugs, are used extensively and often in combination in this group of patients, even though historically almost, none of the drug development data have been collected in this demographic group. In a five-country survey including Australia, New Zealand, Canada, United Kingdom, and the US, approximately 75% of those ewer the age of 65 in all five countries took at least, one prescription Inhibitors,research,lifescience,medical drug on a regular and ongoing basis for a chronic medical condition.5 Many investigators have documented the prevalence of polypharmacy in populations

of similar demographics.6-8 One group estimates that, although the aged were 13% of the US population in 1998, they Inhibitors,research,lifescience,medical received 34% of dispensed prescription drugs, and the average number of prescriptions filled per year for an older person was expected to reach 28.5 in the year 2000.8 In addition, older individuals also use nonprescription medications, including herbal and nutritional supplements.9-12 Although drug therapy has contributed significantly to the management, of numerous medical conditions in older patients, a substantial number of these individuals will experience some sort of adverse drug reaction (ADR).13-15 ADRs have been recognized Inhibitors,research,lifescience,medical as a serious health

problem, and one US government, report estimated that, 10% to 15% of geriatric hospital admissions were caused by ADRs.16 Other data also support this.17,18 Documentation and classification of these events has been hampered by a lack of common terminology and agreed-upon definitions. Inhibitors,research,lifescience,medical In a recent address before a US Senate Committee on adverse drug events, the Director of the Center for Drug Evaluation and Research of the Food and Drug Administration stated that the term “adverse drug reaction” connotes a potential relationship INK1197 between a medication and an undesircd outcome.19 In addition, she noted that the overwhelming majority of ADRs reported are side effects that have AZD1480 price already been identified and described in the product, label and can be expected to occur under certain clinical conditions. Some reports suggest, that, although particular drugs are repeatedly implicated in ADRs among older patients, they continue to be used in ways which are problematic.20 Overall, the most important, indicator of risk for an ADR has consistently been shown to be the number of medications a given individual takes.