Back in the good old days, people would generally take a medication, one at a time, when they were sick, and discontinue it when they were well. But we currently live in an age where it is relatively common for people, particularly the elderly, to be taking multiple medications, (often 10 or more) for years, if not a lifetime. This is known as polypharmacy: the concurrent use of multiple medications by a patient, and the problem is only growing. In the US, 31% of older adults were taking 5...