Weight Loss Supplements Contain Hidden Drugs

Wow. as if being ineffective wasn’t bad enough, many weight loss supplements contain drugs that you didn’t know were in there. Potentially harmful drugs to boot.

For example, Supreme Slim 5.7  was found to contain sildenafil and phenolphthalein recently. On November 9, 2016, the FDA warned consumers not to buy or use this weight loss supplement.

Strangely, both of these drugs are prescribed for erectile dysfunction: Sildenafil, is the active ingredient in Viagra and tadalafil, the active ingredient in Cialis. These drugs can cause symptoms like headache and flushing, and can interact with medications containing nitrates such as nitroglycerine, resulting in dangerously low blood pressure.

Phenolphthalein was reclassified by the FDA in 1999 as “not generally recognized as safe and effective.”  Supreme Slim 5.7 was sold on various Web sites and possibly in some retail stores.

According to ConsumerLab.com, consumers who have purchased this supplement should discontinue use immediately and contact their healthcare provider if they have experienced any adverse side effects.

Consumers and healthcare providers are also encouraged to report any adverse reactions to the FDA’s MedWatch Adverse Event Reporting Program.

In addition, the FDA warned consumers not to buy or use the following weight loss supplements  because they were also found to contain undeclared drugs:

  • Ultimate Body Tox is sold on various web sites and possibly in some retail stores. It was found to contain sibutramine.

  • Skinny Bee Diet is sold online and was found to contain sibutramine, desmethylsibutramine, and phenolphthalein.


Sibutramine is the active ingredient in the obesity drug Meridia which was removed from the U.S. market in October 2010 because it can substantially increase blood pressure and pulse rate in some individuals, and may present a significant risk for patients with a history of coronary artery disease, congestive heart failure, arrhythmias, or stroke.

This drug may also interact, in life-threatening ways, with other medications a consumer may be taking.

Desmethylsiburamine, another drug found in some weight loss supplements, is similar to sibutramine (see above) and should not be the supplement.

Thus, weight loss supplements cannot be trusted to be drug-free. Since they are generally ineffective for producing weight loss anyway, you would be wise to avoid them altogether.