Meridia is a drug by which Sibutramine is popularly known. This was taken off the U.S. market in October 2010. Before you buy Meridia online, you must know all about it. The drug is generally prescribed for weight loss along with low-calorie diet and physical exercise. The reason behind this is to treat obesity that may relate to diabetes, high cholesterol, or high blood pressure.You should remember this fact about Meridia. You should at least 4 pounds of your weight during the first four weeks of intake along with a low-calorie diet.