Last week, for the first time in more than a decade, the US Food and Drug Administration convened a hearing on the promotion of FDA-regulated medical products via online channels, including the latest online phenomenon: social media. Suffice it to say, there was a lot to catch up on.

When FDA last assessed Internet use in 1996, the online experience was not nearly as rich or widespread as it is today. The “140-characters-or-less” confinements of social media do ...