Insomnia and cardiac symptoms are commonly reported side effects of amphetamine diet pills, says ScienceDaily. Amphetamines are banned in the United States for use in weight loss, but pills imported from South America sometimes contain the drug.
Among the more common amphetamine diet pills is fenproporex, says ScienceDaily. This pill is available in many parts of the world and sometimes makes its way to the United States in spite of a Food and Drug Administration ban on such products. Many patients are unaware of the amphetamine content of the pill and complain of chest pains, heart palpitations, headaches and insomnia. These symptoms disappear once use of the drug is discontinued.
Amphetamine-based diet pills are readily available online, and many products do not give a complete or accurate account of ingredients, notes ScienceDaily. Besides amphetamines, these pills sometimes contain thyroid hormones, laxatives, diuretics, benzodiazepines and selective serotonin reuptake inhibitors. Benzodiazepine is a potent tranquilizer and muscle relaxant found under such trade names as Valium and Xanax, says WebMD. It is especially dangerous in combination with alcohol, causing confusion, dizziness, weakness, breathing difficulty and even coma. Selective serotonin reuptake inhibitors are typically used to treat depression via medications such as Paxil, says Mayo Clinic. Side effects include nausea, vomiting, diarrhea, insomnia and anxiety.