The report warns that organised crime groups in the region have stepped up their involvement in making and trafficking methamphetamine and other drugs in the Golden Triangle, the region where the borders of Myanmar, Laos and Thailand meet that has historically been a major source of opium and heroin.
It said the drug market in East and South-East Asia had shifted from such opiates to methamphetamine since the latter part of the 2000s.
"The shift to methamphetamine has affected even countries traditionally known to have a relatively large market for heroin, such as China and Malaysia," it said. "In Malaysia, the number of methamphetamine users detected by law enforcement authorities surpassed that of heroin users for the first time in 2017."
In another indicator of the methamphetamine epidemic, medical treatment related to its use dominated the number of drug-related admissions in several East and Southeast Asian countries, the report said.
The drug agency warned that other synthetic drugs were also gaining traction in Asian markets.
"Potent synthetic opioids (e.g. fentanyl), implicated in fatalities in other parts of the world, are being identified by some countries in the region," it said. Fentanyl is one of a number of opioids responsible for growing deaths of drug users in the United States.
"Aside from methamphetamine which is getting most of the attention because of the surge in seizures and street price drops, synthetic opioids and other drugs have also been found across the region," said Jeremy Douglas, UNODC regional representative for Southeast Asia and the Pacific.
- AP