Legal Drugs in Singapore.
Mephedrone / Meow / Miaow / 4-MMC
To my surprise, the above drugs are not banned in Singapore.
As of February 2010 mephedrone is legal in Singapore, 'CNN Go' reported that it is ordered over the internet and exported from the UK
Mephedrone, also known as 4-methylmethcathinone (4-MMC), or 4-methylephedrone, is a synthetic stimulant and entactogen drug of the amphetamine and cathinone classes. It is reported to be contained in some legal highs and is sometimes sold mixed with methylone.  It is a synthetic substance based on the cathinone compounds found in the khat plant of eastern Africa. Mephedrone can come in the form of capsules, tablets or white powder that users may swallow, snort or inject.  In 2009 it became the fourth most popular street drug in the United Kingdom, behind marijuana, cocaine, and ecstasy.  Slang names include meph, drone,  MCAT and bubbles.  In late 2009, UK newspapers began referring to the drug as meow or miaow (sometimes doubled as meow meow or miaow miaow), a name which was almost unknown on the street at the time. 
I was talking to someone on the bus a while ago and he show me some pills and he said that he ordered them online and they were delivered locally using Singpost.
I was shocked as Singpost now deliver drugs??
Mephedrone to be made Class B drug 'within weeks'
Home Secretary Alan Johnson is to ban mephedrone and other synthetic so-called "legal highs" within weeks.
Effects similar to amphetamines and ecstasy
Sold as a white powder, capsules and pills or can be dissolved in liquid
Often sold online as plant food marked "not for human consumption"
Completely different to methadone, used to treat heroin addicts
Reported side effects include headaches, palpitations, nausea, cold or blue fingers
Long-term effect unknown
Currently legal to buy and be in possession of the powder, but against the law to sell, supply or advertise the powder for human consumption
Already illegal in Israel, Denmark, Norway and Sweden
I've heard about this and seen them in Singapore and US before, and did not know that they were not illegal. I guess someone is not doing their job.
I feel if Ecstasy is illegal, any other drug that has similar effects should be too.
-- Iron Bowl