Were you looking for information about Ephedra? Ephedera is a common misspelling of ephedra.
Although Ephedra (ma huang) can still be found in certain foods and traditional Chinese medicines, the diet pill was banned in the United States due to safety concerns. Ephedra is similar to amphetamines, and may help with weight loss by suppressing the appetite and increasing metabolism. Some of the potentially dangerous side effects include seizures, strokes, or heart attacks.
(For more information, click Ephedra. This article offers an overview of the safety concerns associated with ephedra, possible overdose symptoms, and more.)