Tolerance or. Tolerance and Addiction. You might be tempted to borrow prescriptions or take more than usual. You may use drugs to improve your mood, relieve stress, or escape the reality of life. It is possible to change your bad habits or give up completely on using drugs.
Brain abnormalities that occur over time as a result of chronic drug use provide a challenge to the self-control of a person who is addicted to drugs and interfere with their capacity to resist overwhelming desires to use drugs. Because of this, drug addiction is also an illness that generates relapses.
Long-term use also causes changes in other chemical systems and circuits in the brain, which can affect learning, judgement, decision-making, stress, memory, and behaviour, among other things. Even though many drug users know these bad things will happen, they still take drugs. This is the nature of addiction.