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Drug Abuse, Dopamine and the Reward System Explained

Advances in neuroscience have allowed doctors and scientists to dive deep into the brain’s functioning to better understand the cause of addiction. The brain’s reward system plays a major role, alongside many other factors.

For far too long now, the stigma of drug abuse has led many people to believe that addicts lack willpower, and that they should be able to ‘just stop’ taking drugs. After all, millions of people experiment with drugs and alcohol each year without ever becoming addicted. However, the recent developments in neurobiology have given a better insight into what addiction actually is. By studying the brain’s reaction to different substances, scientists have been able to discover that drug abuse can actually alter the chemical makeup of the brain, which is what causes addiction.

How Does Drug Abuse Affect the Brain?

The brain sits at the epicentre of human activity. In order to do, feel or think anything, the brain is involved. It is the communication centre for the rest of the body, constantly sending out messages to different parts of the body through neurons, neurotransmitters, receptors and transporters.

When it comes to drug abuse, the regular communication pathways are interrupted. The National Institute of Drug Abuse (NIDA) explains it as follows:

“Drugs are chemicals that affect the brain by tapping into its communication system and