It is possible to initially choose to use a drug for the pleasure it gives you. However, it is possible to regret your decision. You might think you have total control over how much you use and how often. But repeated use can cause brain changes. These alterations can be lasting for a long time. These alterations can lead to loss of control and possibly to harmful activities.
Comparison of addiction, abuse, and tolerance: Tolerance refers to the inappropriate use of any type of drug, legal or illegal. You may either use more than the recommended amount of medication, or you substitute a prescription from another person. If you are looking to feel happy, relieve tension, or just ignore reality, you might misuse drugs. However, it is possible to change bad habits or quit completely.
A person who cannot quit is the hallmark of addiction. You should not quit if it is a risk to your health. You should not use drugs if it causes financial, emotional, or other difficulties for you and your loved ones. Even if your goal is to stop using drugs completely, you may find that the urge to obtain and use them takes over every waking hour.
Tolerance and physical dependence are different from addiction. After becoming physically dependent on a drug, it is possible to experience withdrawal symptoms. Tolerance is when a drug's effectiveness decreases over time.