Published Monday, 21 September 2009
The survey also found that levels of cannabis use among young people in Northern Ireland is higher than in the rest of the UK, Ireland and Europe.
The Youth Development Survey questioned 4000 pupils about drugs in 43 schools in Belfast, Ballymena and Downpatrick.
Figures suggest that 45% of teenagers aged 18 and under have tried cannabis.
This figure rises to 43% by the age of 16, and 45% by the age of 18.
The issue of drug use will be discussed at Queen's University this week.
"Monday's event will bring together educationalists and health professionals to discuss the onset and development of problem drug use among teenagers", Dr Patrick McCrystal, Senior Research Fellow at the Institute for Child Care Research, said.
"A number of young people who took part in the Youth Development Survey appear to have developed a drug-using lifestyle by the age of 16 years.
"The findings relating to cannabis are particularly interesting as cannabis is often considered the 'gateway' drug to more serious substance abuse.
Dr Patrick McCrystal said the cannabis users who took part in the study were more likely to be male, have weaker family bonds, and be less committed to school than those who did not use the drug.
"They were also more likely to have smoked cigarettes and drank alcohol to intoxication before the age of 16", he added.
"These findings highlight the need to educate young people about the risks of experimenting with drugs."
Later in the week researchers from across Europe will meet at Queen's to discuss the latest developments in drugs-related issues at the 20th Annual Conference of the European Society for Social Drug Research.