The Director of Audit has called for a shake-up in treatment programmes for drug abusers to tackle the sharp rise in the use of psychotropic drugs such as Ecstasy and cocaine. New admissions of heroin addicts to methadone clinics have fallen by 77 per cent over the past 10 years to 309 a year, but the number of psychotropic drug abusers with psychiatric problems who attend substance abuse clinics has risen 150 per cent since 2000 to 12,606 a year. Yet 67 per cent of the HK$163 million spent by the government last year on voluntary treatment and rehabilitation was still given to services targeting heroin addicts, such as the Department of Health's methadone treatment programme and a residential programme run by the Society for the Aid and Rehabilitation of Drug Abusers (Sarda), the Audit Commission found. The Commissioner for Narcotics should review how public money is shared between organisations offering treatment and rehabilitation and assess whether more cash should be targeted at users of psychotropic drugs, which include ketamine, cannabis and Ice (methamphetamine), according to the Audit Report. Sarda and the methadone programme should be 'critically reviewed' to assess whether they should continue in their present form and how their resources should be rationalised to assess demand for substance abuse centres and strengthen their services to meet community needs, the report said.