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+A stimulant is a substance that elevates [Nervous System](/wiki/nervous-system) activity, temporarily boosting alertness, energy, and attention. These [Psychoactive Drug](/wiki/psychoactive-drug)s often work by increasing the levels of certain neurotransmitters in the brain.
+## See also
+- [Caffeine](/wiki/caffeine)
+- [Dopamine](/wiki/dopamine)
+- [Addiction](/wiki/addiction)
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