The U.S. Food and Drug Administration is warning consumers not to take Venom HYPERDRIVE 3.0, a product sold as a dietary supplement and containing sibutramine. Sibutramine, a controlled substance with risks for abuse or addiction, is a potent drug that poses potential safety risks. “Sibutramine is the active ingredient in an FDA-approved prescription drug used as an appetite suppressant for weight loss,” said Janet Woodcock, M.D.