Drugs affect the brain by altering its normal communication processes. They disrupt neurotransmitter activity, either mimicking natural chemicals to overstimulate reward pathways or blocking normal signaling. This leads to temporary euphoria, but over time, it can cause changes in brain structure and function, impairing memory, decision-making, and self-control. Prolonged use may lead to addiction, as the brain becomes dependent on the drug to maintain balance, further damaging mental and physical health.
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