Struggling with a mental disorder can be a difficult road, one that affects the lives of the suffering individual, as well as surrounding friends and family. But while mental disorders alone may seem difficult, a disorder coupled with a substance addiction can prove far more devastating to everyone involved. And unfortunately, it is all too common for mental disorders to either exacerbate problems with substance abuse, or lead to them altogether. Here is how some mental disorders may lead to addiction, and what you can do to prevent this from happening: