Dam was speaking at a meeting to announce the release of the 2015 UN World Drug Report.
He said the use of psycho-active substances (NPS) has emerged inrecent years, adding that many drug users purchase supplies via theinternet.
The deputy minister said the use of amphetamine-typestimulants (ATS) is common among young drug users in big cities, borderareas and industrial zones, adding that the market for these drugs hasdeveloped swiftly in the past 10 years.
"The VietnameseGovernment realises that the impact of ATS use is very dangerous in thecommunity. ATS users can even commit murder when they lose control," Damsaid.
He said treatment for drug-addicts at Staterehabilitation centres in Vietnam has made remarkable progress in thelast three years. As of May 2015, there were 162 Methadone MaintenanceTherapy clinics in 44 provinces and cities.
More than 29,800 people are receiving treatment, equal to 36.8 percent of the target.
A representative from the Ministry of Public Security said the illicitmanufacture of methamphetamines and other synthetic drugs is expandingrapidly in the country.
He said large quantities weretrafficked into Vietnam from or through Laos to supply the domesticmarket and for further overland trafficking to China.
Heroinseizures continued to rise in the first three months of this year with atotal of 260kg being seized, an increase of 46kg compared to the sameperiod last year.
In 2014, a total of 922kg of heroin was detected. Heroin remains the most widely used illicit drug in Vietnam.
Seizures of ATS reached more than 144 tonnes in the period 2011- 2012,a two-fold increase against 2009, and remained high in 2013.
By December 2014, a total of 541 new psycho-active substances (NPS) hadbeen reported by 95 countries and territories, an increase of 20 percentagainst 2013 (450).
The UN World Drug Report said that thepercentage of drug users around the world was stable, but opiumproduction was increasing.-VNA