 Established programs distribute naloxone, as per WHO's minimum standards, to drug users and their peers, family members, police, prisons, and others.These treatment programs and harm reduction centres operate in Afghanistan, Australia, Canada, China, Germany, Georgia, Kazakhstan, Norway, Russia, Spain, Tajikistan, the United Kingdom (UK), the United States (US), Vietnam, India, Thailand, Kyrgyzstan, Denmark and Estonia.Opioid replacement therapy (ORT), or opioid substitution therapy (OST), is the medical procedure of replacing an illegal opioid, such as heroin, with a longer acting but less euphoric opioid; methadone or buprenorphine are typically used and the drug is taken under medical supervision.