Not uniquely Singapore
Someone asked in a letter in Today today:
"Was any study carried out on the effects of Subutex use and abuse in other countries before it was introduced? If so, what were the findings?
If the findings were adverse, why did the authorities go ahead to use it? If the findings were initially not adverse, did the authorities monitor the experience of other countries in the past few years?"
angry doc did a little googling, and it turns out that Georgia (the one in Europe, not the one in America) has a Subutex-abuse problem too.
In fact, so do Finland, Nepal, Sri Lanka, Bangladesh, Britain, Germany, and New Zealand according to the article.