Abstract: The present invention provides novel compositions and methods for the controlling appetite and weight and/or treating obesity using a (+)-1-(3,4-dichlorophenyl)-3-azabicyclo[3.1.0]hexane or related compound. The invention also provides novel compositions and methods for treating or preventing disorders related to or complicated by excessive body weight or obesity, including coronary heart disease, osteoarthritis, osteoporosis, dislipidemias, gout, atherosclerosis, joint pain, sexual and fertility problems, respiratory problems, gall bladder disease, skin conditions, hypertension, diabetes, stroke, pulmonary embolism, sleep apnea, idiopathic intracranial hypertension, lower extremity venous stasis disease, gastro-esophageal reflux, urinary stress incontinence, metabolic syndrome, insulin resistance and cancer. The methods and compositions of the invention may employ a (+)-1-(3,4-dichlorophenyl)-3-azabicyclo[3.1.