The drug causes euphoria, intensifies emotions, alters self-esteem and increases alertness and aggression. Users feel confident and that they can accomplish anything.
The drug also decreases appetite, and a lack of sleep can cause a loss of concentration, paranoia, anxiety and make users irritable. The effects can continue for eight to 12 hours after smoking the drug.
The drug can also cause psychosis and brain damage and can damage the heart, kidneys, lungs and digestive system. Long-term users age prematurely and can develop skin conditions and dental problems.
An overdose can cause heart attacks, stroke and death.
Ice produces a "high" because methamphetamine ramps up the production of dopamine, a chemical messenger or neurotransmitter that works on the pleasure centers in the brain.
Ice causes brain cells to produce more dopamine and interferes with the brain's ability to absorb excess dopamine, Stewart said....
If a user goes on an ice binge, at a certain point the brain will use up all the neurotransmitters or the body will become so exhausted that all the user can do is sleep, sometimes for days. It can take up to 10 weeks to replenish the brain's supply of neurotransmitters, Stewart said.
The crash can be the most dangerous period for an ice user.
When a user is intoxicated, "it's sort of like you think Superman might feel. There's a feeling of being the center of things looking out," said Dr. Tom Leland, medical director of Community Care Services in Honolulu.
"When the drug wears off, there's an inversion of that," he said. "It goes from 'I can do no wrong,' to 'Everybody's accusing me of being a bad person.'"
An ice user going through a crash can become suicidal, depressed, anxious and have trouble sleeping.
well fucking duh.