AGGRESSION
Meth stimulates the emotional center of the brain (the amygdala). The longer Meth is used, the more sensitive and hyperactive the emotional center of the brain becomes.
The result is powerful negative emotions that can turn into aggression for little or no reason. Depending on the person and the circumstances, this reaction can range from irritability and moodiness to verbal attacks and even physical violence.
When people stop using, get sleep, and begin to repair their bodies, their brains also repair and this behavior subsides.
TRIGGERS
No one starts using Meth because he or she craves it. Craving develops over the course of use. As we've seen, using Meth releases large amounts of dopamine, creating intense pleasure.
The brain automatically associates or "connects" the people, places, things, and emotions surrounding Meth use with this powerful feeling of pleasure. We call these "triggers" for using Meth.
For an addicted Meth user, thinking about or coming into contact with these triggers will actually cause a release of dopamine in the brain, which creates a powerful craving for Meth.
Triggers generally fall into two categories: external triggers, which are the people, places, and things that users have associated with Meth use; and internal, or emotional triggers, which are intense emotional states (anger, fear, joy, desire, etc.) that often occur in association with Meth use.
CRAVINGS
When Meth users try to stop using, they become discouraged about their inability to resist cravings. Sincere promises to stop are often broken within hours of being made.
Self-esteem is damaged and hopelessness sets in. Despite the enormous negative consequences to their lives, they still crave the drug, and once the craving starts, they have a diminished capacity to say, "Stop."
Some people fear that craving will always result in relapse and that they cannot possibly live life forever fighting these powerful urges. If they do relapse, they often think it is "proof" that "cravings are irresistible."
It is therefore important for Meth users to learn that they can resist cravings, and that the cravings become less severe as recovery time increases. A simple rule to follow is, "Don't use Meth today and it will be easier not to use tomorrow."