(+)-DDMS (R-Didesmethylsibutramine , (R)-DDMS) is one of sibutramine active metabolites. Sibutramine is widely used in the treatment of obesity. Sibutramine acts by inhibiting the reuptake of serotonin and noradrenaline in synapses, thereby enhancing both satiety and energy expenditure. In preclinical models (R)-enantiomer of Didesmethylsibutramine was clearly more potent than the (S)-enantiomers and (R)-didesmethylsibutramine shows some activity in all tests. (S)-didesmethylsibutramine affected locomotor behavior and the Porsolt test but appeared to be completely inactive on food intake. R-Didesmethylsibutramine is more potent than sibutramine in depressing food intake and decreasing body weight, suggest that these enantioselective metabolites might be safer and more effective than sibutramine as potential therapies for obesity.