Sales of over-the-counter products containing codeine in 31 countries, 2013-2019: A retrospective observational study
Introduction Opioid prescribing trends have been investigated in many countries. However, the patterns of over-the-counter purchases of opioids without a prescription, such as codeine combinations, are mostly unknown.
Objective We aimed to assess national sales and expenditure trends of over-the-counter codeine-containing products purchased in countries with available data over 6 years.
Methods We conducted a retrospective observati... Expand abstract
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