Central nervous system stimulants: Signs and symptoms

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This class of drugs includes amphetamines, methamphetamine, cocaine and methylphenidate (Ritalin). Signs and symptoms of use and dependence on these drugs include:
Euphoria, Decreased appetite, Rapid speech, Irritability, Restlessness, Depression as the drug wears off , Nasal congestion and damage to the mucous membrane of the nose in users who snort drugs, Insomnia, Weight loss, Increased heart rate, blood pressure and temperature and paranoia.

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