Sex and gender differences in substance use disorders

Area of Science:

• Neuroscience
• Psychiatry
• Genetics

Background:

• The prevalence of substance use disorders (SUDs) historically shows a greater incidence in men, but this gender gap is narrowing.
• Understanding the interplay of biological sex and gender is critical for addressing SUD etiology, maintenance, and treatment.
• Sex/gender differences influence SUDs across biological, epidemiological, and clinical domains.

Purpose of the Study:

• To provide a critical review of sex and gender differences in the biology, epidemiology, and treatment of SUDs.
• To synthesize current knowledge on how biological sex and gender impact the development and course of SUDs.
• To identify gaps in research and suggest future directions for understanding sex/gender-specific aspects of SUDs.

Main Methods:

• Literature review synthesizing existing research on sex/gender differences in SUDs.
• Analysis of biological factors (brain, endocrine, metabolic) and gender influences (sociocultural roles).
• Examination of epidemiological trends and treatment outcomes across sexes and genders.

Main Results:

• Biological sex differences are observed in brain structure/function, endocrine, and metabolic systems.
• Gender roles significantly contribute to substance use initiation and SUD progression.
• Women often experience more severe medical, psychiatric, and functional consequences of SUDs.
• No substantial differences in SUD treatment outcomes between men and women were identified.

Conclusions:

• Sex and gender significantly influence SUDs, complicated by interacting biological and environmental factors.
• Further research is needed on hormonal influences, translational models, and understudied populations (e.g., pregnant women, those with co-occurring disorders).
• Elucidating these differences is vital for developing targeted and effective SUD prevention and treatment strategies.