Many individuals in Castalia who find their way to drug rehab are dual diagnosis clients with co-occurring mental and substance abuse problems. Surprisingly, as many as 1/3 of those who struggle with mental health issues in Castalia also take part in substance abuse at some time in their lives. These dual diagnosis clients often turn to drugs or alcohol to self medicate in an attempt to ease the symptoms of an underlying psychiatric disorder. Some treatment clients aren't even diagnosed with a psychological condition, and only when they begin to receive treatment at a drug rehabilitation program is this sort of issue uncovered. This alone can help resolve addiction issues and put the person in a position to get treatment for both conditions so that they have a strong chance of remaining abstinent and psychologically healthy in the future.