Anti-addiction drugs used to treat obesity.File photo dated 08/09/09 of an obese woman. Issue date: Friday July 30, 2010. Dramatic effects have been seen from a weight loss recipe that combines anti-addiction drugs with dieting and exercise. A group of obese trial patients put on the programme lost up to 6% of their bodyweight over the course of a year. US researchers, led by Professor Frank Greenway, from the Biomedical Research Center, Louisiana State University, Baton Rouge, recruited 1,742 patients aged 18 to 65 for the 56 week trial, but only half saw it through to the end. Participants were randomly prescribed either a combination of the drugs naltrexone and bupropion or “dummy” placebo pills. See PA story HEALTH Obese. Photo credit should read: Fiona Hanson/PA Wire URN:9246550 (Press Association via AP Images)