Young people who smoke cannabis regularly are 60 percent less likely to finish school or get a degree than those who have never used the drug.
New research also shows teenagers who use cannabis daily are 18 times more likely to become dependent and are 8 times more likely to use other drugs in later life.
Details of the review of almost 4-thousand cannabis users, also found that daily users in their teens are 7 times more prone to suicide attempts.
Last month, a Eurobarometer survey found that the percentage of Irish young people who admit to using cannabis is more than twice the European average.
Dr. Edmund Silins, from the University of New South Wales in Australia is lead author of the report - he says daily users are more likely to use other drugs in later life
