"There is good evidence for the efficacy of Orlistat (Alli) in weight reduction but it should not be used as the sole element of weight management, " says Dr Colin Cable of the Royal Pharmaceutical Society of Great Britain, who reviewed the products.

BBC: Slimming pills: Do the claims add up?

Started in 2005 by Alli Sports, which is a division of NBC Sports Group, the Dew Tour is among the most-watched action sports competitions each year.

FORBES: The Dew Tour Changes, But Mountain Dew Remains A Top Action Sports Brand

In that same year, counterfeits of the weight-loss drug Alli sold over the Internet contained none of the active ingredient in the real drug but did contain sibutramine, the prescription-strength weight-loss drug Meridia, which has since been removed from the U.S. market because of concerns about cardiac side effects.

FORBES: Fake Drugs - All At a Pharmacy Near You!

GlaxoSmithkline executives believe that anticipating negative Web buzz around Alli, the over-the-counter diet drug it introduced in June, helped it control the conversation about the drug and its embarrassing side effects.

FORBES: Crowd Control

And when a rival made a commercial that poked fun of Alli's downside, GSK created a link to the spot to join in on the joke.

FORBES: Crowd Control

The group said that orlistat, sold in prescription form as Xenical and over-the-counter as Alli, causes serious side effects such as liver injury and kidney failure.

CNN: Why isn't there a safe weight-loss pill?

They are Abdullai Alli, 46, from Croydon, Andrew Goward, 37, from Mansfield in Nottinghamshire, Gary Heaven, 47, from Tulse Hill, London, Kevin Lewis, 45, from Aylesbury, Buckinghamshire, Giovanni Recchia, 46, from Retford, Nottinghamshire, Mohamed Saleh, 24, from Hammersmith, London.

BBC: Danyal Buckharee admits duping hundreds of drivers