What does someone high on amphetamines or methamphetamine experience?
People doing speed typically have dilated pupils and may seem agitated, talk excitedly or non-stop, feel little or no hunger, stay awake for hours or days, over-exert themselves in physical activity, and take risks due to over confidence. Regular users often experience visible weight loss. The overall effects can last anywhere from six to 24 hours, although the more extreme effects are much shorter. People who smoke or inject methamphetamine experience an intense "rush" immediately afterwards which lasts only a few minutes and is followed by a state of agitation. Snorting speed or taking it in a pill produces euphoria - described as a "high," but not a rush.
Amphetamines and methamphetamine cause the brain to release large amounts of dopamine, which is what creates the euphoria users describe. This dynamic is also responsible for the "crash" and depression users feel when the effect of the drug wears off, however. Wanting to regain that energy and "high" - and needing increasing amounts to attain it - are what make these drugs so addictive.
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