Speed, meth, chalk, crystal, ice, glass. These are all names for the drug methamphetamine. Methamphetamine comes in
many different forms and is snorted, swallowed,injected, or smoked. They have discovered that even three years after long-time methamphetamine users had quit using the drug, their dopamine neurons were still damaged. Scientists don’t know yet whether this damage is permanent,but this research shows that changes in the brain from methamphetamine use
can last a long time. Research with animals has shown that the drug methamphetamine can also damage neurons that contain
serotonin. This damage also continues long after the drug use is stopped.