This episode reframes addiction as a disorder of learning and salience, not morality or willpower. Drugs of misuse hijack reward pathways, over-assign importance to cues, and remodel circuits that govern impulse, stress, and memory. We trace how repeated exposure converts voluntary use into compulsion, why abstinence alone is fragile, and how pharmacological treatments work by stabilising circuits rather than “curing desire.”

Key takeaways you’ll build and reuse throughout the series:

* Reward versus reinforcement: how dopamine teaches the brain what matters—and when that teaching goes wrong.

* Neuroadaptation over time: tolerance, sensitisation, and withdrawal as predictable circuit changes.

* Cue-driven relapse: why environment and memory trigger use long after detoxification.

* Pharmacotherapy in context: agonist, partial agonist, antagonist, and aversive strategies mapped to mechanism.

* Clinical realism: addiction as a chronic, relapsing condition requiring proportionate, sustained care.

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