Children who are bullied are known to be a greater risk of developing depression. However, a new study from University of Washington researchers has shown that girls who become depressed as a result of bullying are more likely to abuse drugs, putting them at risk for addiction and the need for substance abuse help.

Previous research has shown that bullying often leads to loneliness, depression and suicide in adolescents. However, the new investigation is among the first to show that the problem also increases the risk of drug abuse, which researchers said raises questions about the effectiveness of preventative measures being taken by schools.

For the study, researchers examined data from national teen surveys. These questionnaires asked participants about how often they were bullied, how this made them feel and whether or not they engaged in substance abuse. The results showed a strong association between bullying, depression and drug use.

Researchers said that their findings underscore the importance for parents of taking instances of bullying seriously. Whether their child is on the giving or receiving end, efforts should be made to eliminate bullying.