Around 10.5 per cent of them are living with HIV. Data at the national level, however. As evidence regarding the effectiveness of different services and treatment programmes (needle and syringe programmes, opioid substitution therapy, antiretroviral therapy and the provision of naloxone) becomes more accepted in the countries, it is expected that more targeted service programmes will be implemented in the region. The provision of psychological treatment services has been expanded in some countries in the region to respond to the demand for treatment for amphetamine-type stimulant use.