5th Edition of Addiction World Conference 2026

Abstract

Addiction was historically viewed as a disease of “weak personality” until the latter half of the 20th century. The scientific and medical communities did not address it systematically. Addiction is a chronic relapsing brain disease, arising due to complex conditions from a dynamic interplay of biological, psychological, and social elements. It does not stem from a single factor, in fact it’s an outcome of a persistent conditions where consequences are not merely poor choices, but direct effects of neuroadaptations modified by environmental factors

Addiction results from repeated long-term exposure to drugs, leading to changes in central nervous system, especially in the midbrain dopamine system, resulting in an addictive state with complex behaviors resulting in dependence, tolerance, and craving. Drug addiction represents a dramatic dysregulation of motivational circuits caused by a combination of exaggerated incentive salience and habit formation, reward deficits and stress. Three phenomena characterize addiction:

1. Binge/Intoxication,
2. Withdrawal/Negative affect and
3. Craving (preoccupation/anticipation).

Impulsivity and positive reinforcement often dominate the first stages, driving the motivation for drug seeking, and compulsivity and negative reinforcement dominate the terminal stages of the addiction cycle

Causes of Addiction: The development of addiction is determined by an individual’s vulnerability interacting with their environment. The primary factors can be categorized as follows.

Biological Factors:

• Accounts for approximately 40–60% of a person’s risk for addiction
• Genetics and Heritability:  suggests a significant genetic component, where Specific genes can influence how a person’s brain responds to substances.
• Brain Chemistry and Function: All addictive substances and behaviors

target the brain’s reward circuit, (specifically the nucleus accumbens)

Thus, addiction is a multifaceted public health crisis rooted in an intricate relationship between an individual’s genetic makeup (biology), their coping mechanisms and mental health (psychology), and their environment (social context). Imaging studies have shown changes in areas responsible for executive functioning.

Take Home Message

• The neurobiological pathways that modulate reward, stress resiliency and behavior inhibition are among those having underlying addiction liability.
• Variation in the neurobiology of addiction is genetically influenced by correlation of addiction liability with heritability.
• The individualization of treatment and prevention is likely to be advanced by the discovery of genetic predictors of the neurobiological pathways that underlie addiction as well as Brain Imaging