Understanding Addiction

Introduction

Biological Basis

Genetic predisposition accounts for 40-60% of the vulnerability to addiction, highlighting its nature as a medical condition.

Environmental Influence

Factors like early exposure, trauma, and socioeconomic conditions play critical roles in the development of SUD.

Addiction is a chronic, relapsing brain disorder characterized by compulsive substance use despite harmful consequences. Understanding the science behind addiction is essential for providing compassionate, effective care.

The Neuroscience of Addiction

The Reward System Hijack

The brain's reward system evolved to reinforce survival behaviors. Addictive substances create a dopamine surge that far exceeds natural stimuli:

Opioids

2-10x Normal Release

Cocaine

Blocks Reuptake

Alcohol

GABA/Glutamate Shift

Nicotine

Acetylcholine Trigger

The Reward System

The brain's reward system evolved to reinforce behaviors essential for survival—eating, social bonding, reproduction. This system releases dopamine, creating feelings of pleasure and motivation.

Addictive substances hijack this system:

Opioids: 2-10x normal dopamine release
Cocaine: Blocks dopamine reuptake
Alcohol: Enhances GABA, inhibits glutamate
Nicotine: Stimulates acetylcholine receptors

Neuroplasticity and Tolerance

With repeated use:

Brain reduces natural dopamine production
Receptor sensitivity decreases (tolerance)
More substance needed for same effect
Without substance, person feels worse than baseline

The Three Stages of Addiction

| Stage | Brain Region | Experience | |-------|--------------|------------| | Binge/Intoxication | Basal ganglia | Pleasure, euphoria | | Withdrawal/Negative Affect | Extended amygdala | Anxiety, irritability, pain | | Preoccupation/Anticipation | Prefrontal cortex | Craving, loss of control |

Stigma and Language

How we speak about addiction affects patient care and recovery. Use person-first language to reduce bias.

Instead of

Addict or Substance

Clean/Dirty Tests

Use This

"Person with Substance Use Disorder"

"Positive/Negative Results"

Words Matter

| Instead of... | Say... | |---------------|--------| | Addict, junkie | Person with substance use disorder | | Clean/dirty (drug tests) | Positive/negative | | Abuse | Use, misuse | | Habit | Substance use disorder | | Relapse | Recurrence of use |

Why Stigma Harms

Prevents people from seeking help
Reduces quality of care received
Increases shame and isolation
Contributes to policy failures

Remember: Addiction is a medical condition, not a moral failing.

Risk Factors

Biological

Genetic predisposition (40-60% heritability)
Mental health conditions
Early exposure to substances

Environmental

Trauma and adverse childhood experiences
Peer and family substance use
Poverty and lack of opportunity
Easy access to substances

Developmental

Age of first use (earlier = higher risk)
Adolescent brain vulnerability
Incomplete prefrontal cortex development

Opioid Use Disorder in India

The Current Crisis

Estimated 2.3 million opioid users in India
Punjab, Northeast states particularly affected
Pharmaceutical opioids and heroin both prevalent
Treatment access limited in rural areas

Common Presentation

Tramadol, codeine-containing cough syrups
Heroin (especially border regions)
Prescription opioid diversion
Poly-substance use common

Case Study: Rajesh