The brain and behaviour are both impacted by the condition of addiction. Substance addiction makes it unable to resist the impulse to use the drug, regardless of how harmful it may be. The sooner users receive treatment for drug addiction, the better overall chances are of avoiding some of the disease's more serious side effects. Not simply heroin, cocaine, or other illicit narcotics are involved in drug addiction. Alcohol, nicotine, sleep aids, anti-anxiety drugs, and other legal substances can all cause addiction. Opioids, or narcotic painkillers, can also lead to addiction in certain people whether they are purchased legitimately or illegally. The idea that one may decide how much and how frequently to utilise it is possible. However, drugs over time alter how the brain functions. These bodily alterations may last for a long period. They can cause one to lose control and cause destructive behavior. When someone can't quit, that is addiction. Not if it endangers their health. Not when it results in issues with money, emotions, and other things. Even if one wants to stop using drugs, the need to obtain them might be strong every minute of the day. Additionally, tolerance or physical reliance is not the same as addiction. When you abruptly cease using a drug in situations of physical dependency, withdrawal symptoms take place. When a dosage of a drug loses its effectiveness over time, tolerance occurs. For instance, if opioids are used for pain management over an extended period of time, tolerance and even physical dependency may set in. This does not always imply addiction.