Many individuals in Herculaneum who end up in drug rehab are dual diagnosis clients with co-occurring mental and substance abuse problems. Actually, as many as 1/3 of those who suffer with mental health issues in Herculaneum, Missouri also become involved in substance abuse at some time in their lives. These dual diagnosis clients frequently turn to alcohol or drugs to self medicate as a way to relieve the symptoms of an underlying psychiatric condition. Some addicted individuals aren't even diagnosed with a disorder, and only when they begin to receive treatment at a drug rehabilitation program is this sort of psychological condition brought to light. This in itself can sometimes help resolve addiction issues and put the person in a position to receive treatment for both disorders so that they have a strong chance of remaining abstinent and psychologically stable in the future.