Regardless of resources, is there a tracking system in place?
If you have an individual out there right now who goes to Shoppers Drug Mart and wants to buy 50 bottles of Advil, because it's available over the counter, no one is going to be able to monitor that. If the person goes to the family doctor and is actually prescribed a certain set of medications, the doctor is going to be able to look at his or her chart.
Who's monitoring how much usage of these over-the-counter products is occurring?