This is fresh from the FDA.  If you’re using Meridia (Sibutramine) you may want to bring this up with your doctor:

FDA notified healthcare professionals and patients that it is reviewing preliminary data from a recent study suggesting that patients using sibutramine have a higher number of cardiovascular events (heart attack, stroke, resuscitated cardiac arrest, or death) than patients using a placebo (sugar pill). Sibutramine is marketed as Meridia, a prescription drug, in the United States. Meridia was approved by FDA in 1997 for the management of obesity, including weight loss and maintenance of weight loss, in conjunction with a reduced calorie diet. Meridia is only recommended for obese patients with an initial body mass index (BMI) ≥ 30 kg/m2, or BMI ≥ 27 kg/m2 with other risk factors (e.g., diabetes, high cholesterol, controlled high blood pressure).The analysis of these data is ongoing and FDA is making no conclusions about the preliminary findings at this time. These findings highlight the importance of avoiding the use of sibutramine in patients with a history of coronary artery disease (heart disease), congestive heart failure (CHF), arrhythmias, or stroke, as recommended in the current sibutramine labeling.

Read the MedWatch safety summary, including a link to the FDA Early Communication about an Ongoing Safety Review, at:

http://www.fda.gov/Safety/MedWatch/SafetyInformation/SafetyAlertsforHumanMedicalProducts/ucm191655.htm

Notice I said to bring it up with your doctor: N E V E R stop using medication without first talking it over with your doctor.