Sibutramine is a slimming pill, one of the few that received FDA approval for the treatment of obesity in people who have trouble losing weight otherwise. During the treatment with sibutramine your blood pressure may need to be measured regularly as this medicine has been reported to cause increased blood pressure on some people taking it. Taking sibutramine in spite of a history of an allergic reaction can lead to the following symptoms: hives, difficulty breathing, and swelling of your lips, face, tongue and throat. Talk to your doctor about the possibility of drinking coffee or tea while taking sibutramine, as caffeine these drinks contain can worsen some of the side effects you are likely to experience when taking sibutramine.

When sibutramine interacts with certain medications you are taking a serious syndrome (a set of typical symptoms) may occur. If you experience anxiety, poor coordination, sweating, vomiting, fast heartbeat, confusion, weakness and loss of consciousness make sure you seek emergency medical assistance. Sibutramine must not be given to children younger than 16 as the effects of this drug in patients of this age group have not been properly studied. If you think you may have taken too much of this medicine, make sure you report this to your local emergency room as soon as possible. The most typical symptom of sibutramine overdose is fast heartbeat.