http://www.niapublications.org/agepages/medicine.asp
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National Institute on Aging Information Center
Many older people owe their health in part to new and improved medicines and vaccines. But using medicines may be riskier for older adults, especially when several medicines are used at one time. Taking different medicines is not always easy to do right. It may be hard to remember what each medicine is for, how you should take it and when you should take it. This is especially true of people with memory problems or dementia.