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of 2011, around a third of older adults in the US reportedly used OTC drugs, and this number is increasing. By 2018, the prevalence of use by adults in the U.S. as first-line treatment for minor illnesses had reached 81%: however, there is some debate as to whether this figure relates to an actual improvement of health.

Regulation by country

Canada

In Canada, there are four drug schedules:
* Schedule 1: Requires a prescription for sale and is provided to the public by a licensed pharmacist.

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