Psychology : The Impact of Drugs on the Brain

Changes in brain chemistry: Drugs can alter the levels of neurotransmitters, which are chemicals that are used to transmit signals between neurons. For example, drugs like cocaine and methamphetamine increase levels of dopamine, which is associated with pleasure and reward, leading to a feeling of euphoria.

Damage to brain cells: Some drugs can damage or kill brain cells, leading to cognitive impairment and other neurological problems. For example, prolonged use of alcohol can cause brain damage, including shrinkage of brain tissue and loss of cognitive function.

Changes in brain structure: Some drugs can cause structural changes in the brain, leading to long-term changes in brain function. For example, long-term use of marijuana can alter the structure of the hippocampus, which is involved in memory and learning.

Impaired judgment and decision-making: Drugs can impair judgment and decision-making abilities, leading to risky behaviors and poor choices. 

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