To ensure that drug treatment can be available to persons with co-occurring psychological issues, Partial Hospitalization drug rehabilitation facilities in Mendon, Massachusetts can deliver rehab in special hospital and mental health clinic facilities for clients in need of rehab. Partial Hospitalization the name for this kind of drug treatment facility, because the individual will undergo drug and alcohol rehabilitation during the day and will then go home at night for about seven days a week. This is why these drug and alcohol rehabilitation facilities are also referred to as Day Treatment. Partial Hospitalization drug and alcohol rehab programs address drug and alcohol addiction disorders and psychological troubles at the same time so that treatment staff can make sure that the treatment client avoids fall back into drug use when drug treatment is done.