As with almost all other products that are bought and sold in the 21st century, pharmaceuticals are being ordered over the internet and shipped via mail more frequently. It’s a growing trend, but is it viable — or even ethical — enough to become the new way we get our medicine? In the United States, we hold 45 percent of the global pharmaceutical market, a share valued at almost $446 billion. We spent $425 billion on medicine in 2015, and another...