Are there price controls on Jaguars in the UK, or any country for that matter? The issue is not one of simple price arbitrage.
You’re assuming every country but the US has price controls on pharma. A cite to that affect would be useful.
Also, the drugs I’m familiar with are not reimported. They are made overseas. Usually by a division of the American manufacturer. Advocating a captive US market for any product is so far from free trade as to be a laugh.