Sometimes those with mental disorders can also experience other types of physical or mental illness. One such mental illness they may be at risk for is addiction.

If you're treating a teen for mental health, it's important to understand the big picture. The big picture includes how much they drink, smoke or use marijuana.

Marijuana, cocaine and alcohol are the most commonly abused substances by schizophrenics. Data on this substance abuse varies widely, muddling the picture.

Previous research argued that patients with bipolar disorder, or manic-depressive disorder, are more likely to be violent. Is this increased violence due to the bipolar disorder alone, or caused by other aspects of the individual's behavior?

Psychotic illnesses may develop earlier in those who smoke marijuana compared to those who do not smoke the plant.

A new study suggests veterans with any psychiatric illness face an increased risk of suicide and those with bipolar disorder are at an even greater risk.