The information requested is not available in the format requested relating to the number of people prescribed medicine.
Data are available from the NHS Information Centre on the total number of prescription items for drugs dispensed in England in the community for the treatment of obesity over the last three years. This information is provided in the following table:
British National Formulary chemical name Items 2006 Diethylpropion Hydrochloride 7 Orlistat 775,718 Phentermine 15 Rimonabant 23,532 Sibutramine 264,403 2006 total 1,063,675 2007 Diethylpropion Hydrochloride 3 Orlistat 828,795 Rimonabant 113,172 Sibutramine 294,999 2007 total 1,236,969 2008 Diethylpropion Hydrochloride 6 Orlistat 849,809 Rimonabant 106,720 Sibutramine 325,701 2008 total 1,282,236