The FDA warned consumers not to buy FATZorb, a weight-loss product sold online, because it contains hidden drug ingredients including sibutramine—a banned substance that can dangerously raise blood pressure and heart rate. The product also contains phenolphthalein, a chemical that studies suggest may increase cancer risk.

• •FDA confirmed FATZorb contains sibutramine, desmethyl sibutramine, benzyl sibutramine, and phenolphthalein
• •Sibutramine was removed from the US market in October 2010 for safety reasons
• •Phenolphthalein is not an active ingredient in any approved drug in the United States