From King’s College London:
IOT [Injectable Opioid Treatment] involves the prescription and supervised self-administration of injectable diamorphine (pharmaceutical heroin) or injectable methadone in a supervised clinical setting for opiate misusers
Some patients don’t respond to our current treatments. This makes the availability of other types of treatment (second line therapy) a good idea. Unfortunately, Australians have no access to injectable opioid treatment. It wasn’t always so:
Heroin was legally available on prescription in Australia until 1953. It was so widely used as a painkiller and in cough mixtures that Australia was the world’s largest per capita user of heroin. The 1953 prohibition of heroin was the result of international pressure on Australia to conform to the prohibition of heroin adopted by other countries, with some opposition from the AMA. Ironically, heroin, cannabis, and other drugs were prohibited in Australia well before their use became a major social issue.
Perhaps the biggest problem we had with heroin at this time was doping in horse racing.
Follow this link for a historical account of heroin prohibition in Australia.