It's more than tradition and efficiency; the US doesn't have the supply chain trust issues that many other countries do when it comes to prescription drugs. The

It's more than tradition and efficiency; the US doesn't have the supply chain trust issues that many other countries do when it comes to prescription drugs. There are plenty of parts of the world where a bottle of loose pills is going to be treated as suspect no matter who dispenses it to the patient. Giving consumers individual packages with counterfeit-deterrent measures and serialization that can be verified with the manufacturer as part of a valid production lot increases consumer confidence and makes counterfeiting more difficult.