The new diet drug Alli, produced by GlaxoSmithKline, is selling fast. As you’ve probably seen in the news, it’s the first FDA-approved OTC weight-loss pill.

What’s interesting to me is that Alli’s embarrassing side effects have done little to dissuade potential users from buying the product.

Glaxo says to expect “gas with oily spotting” and “more frequent stools that may be hard to control.” Glaxo also says that it is just “the excess fat that passes out of your body and is not harmful. In fact, you may recognize it as something that looks like the oil on top of a pizza.”

TMI, dudes.

Then there’s this helpful tip from the drug’s official Web site:

“It’s probably a smart idea to wear dark pants, and bring a change of clothes with you to work.”

A commenter on the Wired Science blog provided his own characterization:

Lemme tell ya what! I tried this product when it was a prescription, Xenical…yeah… after a dash into a public bathroom, having to throw away my underwear, and then a dash home – that cured me of taking it again! “Oily discharge” is an understatement; I guess if you could call what happened to the Exxon Valdez an “oily discharge” then you would be on target! I will be curious to see how many people buy this a second time……