Reevaluating the brain disease model of addiction

Area of Science:

• Psychiatry
• Neuroscience
• Philosophy of Medicine

Background:

• The brain disease model of addiction (substance use disorder [SUD]) has been prevalent for 30 years, viewed as a chronic relapsing condition.
• This model aimed to explain SUD etiology and reduce stigma, but faces criticism for weak empirical support and neglecting psychosocial factors.

Purpose of the Study:

• To critically examine the definition and application of the "brain disease" concept in addiction research.
• To analyze the implications of narrow and broad definitions of brain disease on understanding and treating SUDs.
• To propose a path forward for more productive debate and knowledge advancement in addiction.

Main Methods:

• Philosophical analysis of concepts in psychiatry.
• Review of theoretical assumptions and empirical evidence for different views of brain disease in addiction.
• Examination of treatment implications.

Main Results:

• The lack of a clear, consistent definition of "brain disease" obstructs productive discourse on addiction.
• Two main conceptualizations of brain disease exist: a "narrow view" requiring specific damage and a "broad view" considering all mental activity as brain-based.
• Both views are applied inconsistently in addiction research, impacting understanding and treatment.

Conclusions:

• Moving beyond the current debate requires a more precise and consistently applied definition of brain disease in the context of addiction.
• Addressing the conceptual ambiguity is crucial for advancing research and improving treatment strategies for substance use disorders.