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Definition
of
Dual diagnosis
from
NICE Guideline NG58 - Coexisting severe mental illness and substance misuse: community health and social care services
![National Institute for Health and Care Excellence](https://static.wixstatic.com/media/0b12bc_737adb340e2e43f8adbf0feb9b6ba36b~mv2.png/v1/fill/w_81,h_81,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/_edited_edited.png)
Dual diagnosis usually refers to mental illness combined with substance misuse. But it may also be used to describe a number of other conditions, including physical health problems. In the UK social care sector, the term is sometimes used for people who have both a learning disability and a mental illness.
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Plain English definition
of
Dual diagnosis
from
Think Local Act Personal (TLAP) Jargon Buster
![Think Local Act Personal](https://static.wixstatic.com/media/0b12bc_72097b1e3ee14fc986eff2b06ff14cec~mv2.png/v1/fill/w_81,h_81,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/_edited_edited.png)
A combination of severe illness and problematic drug or alcohol use. These two things are closely linked for many people. People with a dual diagnosis often have serious physical, social and psychological problems.
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