99e69144_hamphetamine___Methamphetamine__Physical_Effects
[System] Central Nervous System [Symptoms and Signs] – Signs include agitation, violent behavior, comas, new-onset seizures, headaches, emotional lability (constant change of emotions), hypersexuality and paranoia [Physical Effects] 
– Agitation and paranoia are frequent results from alternations that occur in the CNS dopamine, serotonin and glutamate pathways (see Nervous System page)
Effects of Methamphetamine | Methamphetamine
Physical Effects