The FDA is warning consumers not to use two unapproved drug products marketed as dietary supplements for weight loss. Emagrece Sim Dietary Supplement, also known as the Brazilian Diet Pill and Herbathin Dietary Supplement, may contain several active ingredients, including controlled substances, found in prescription drugs that could lead to serious side effects or injury. Consumers are advised not to use the Emagrece Sim and Herbathin products and to return them to the suppliers. There may be other manufacturers or suppliers of imported Emagrece Sim and Herbathin, and consumers should exercise caution in using any of these imported products. The products contain prescription drugs, including several controlled substances, including chlordiazepoxide HCl (the active ingredient in Librium), and fluoxetine HCl (the active ingredient in Prozac). Chlordiazepoxide HCl (Librium) is used to relieve anxiety and to control the symptoms of alcohol withdrawal. It may be habit forming, and can cause drowsiness and dizziness and impair the ability to drive. Fluoxetine HCl (Prozac) is an anti-depressant medication used to treat obsessive-compulsive disorder, panic disorder, and bulimia. It has been linked to several serious drug interactions and certain serious adverse events, including suicidal thinking and behaviors in pediatric patients, anxiety and insomnia, and abnormal bleeding. These drugs should only be taken by patients who are under the supervision of a health care provider.