The long-term use of drugs can cause changes in brain chemical systems and circuits, which may alter learning, judgements, decision-making, stress, memory and behavior. These adverse effects are not known by many drug users, but they continue to consume drugs, which is what constitutes addiction.
Why are some people addicted to drugs, while others aren't? One factor cannot predict if someone would become addicted. The risk of becoming addicted to drugs is affected by a variety of factors. There are many risk factors that can increase the chance of someone becoming addicted to drugs.
How to avoid becoming addicted to prescription painkillers. Most people who use pain medication as prescribed by their doctor don't get addicted, even if they do so for a while. Fears of addiction shouldn't stop you from taking painkillers to manage your pain. If you have a family member who has, or have misused drugs or alcohol before, you could be at greater risk.
                
 
How to Avoid Getting Addicted to Prescription Drugs. Most people who take pain medication in accordance to their doctor's recommendations do not become addicted, even though they may use it for a while. Fear of developing a dependency on prescription painkillers should not stop you from using these substances to relieve your discomfort. If you are already a user of substances or have family members who have, you could be at greater risk.
 
Keep these important points in mind: Addiction is a chronic disorder characterized by persistent drug seeking and addiction. This is despite the fact the adverse effects of drug abuse are hard to manage.
Brain alterations caused by chronic drug abuse can lead to brain alterations. This can make it difficult to control one's urges and reduce their ability to resist them. Drug addiction can also lead to relapses. 
                                            
                                             
There are two types of addiction: Tolerance and abuse. Either you go over the recommended dosage of medication or you take a different prescription. You can misuse drugs to get high, relax, or ignore the reality. You can often change your bad habits, or stop using completely. 
  
If someone relapses after trying to stop taking drugs, they will likely relapse. Relapses indicate that further therapy or another therapeutic approach is needed.
Majority of drugs work by flooding the brain's reward system with too much dopamine. The reward circuit is responsible for the reinforcement of dangerous and pleasant behavior. This is why people are inclined to repeat these actions.
                                             
Points to Remember: Addiction to Drugs is a chronic condition that manifests itself in obsessive drug searching and use despite its negative effects. 
Which person is most likely to develop an addiction? Each person's brain and body are unique. Different people also react to medications in different ways. Some people feel infatuated with the experience and desire more. Some people dislike it and won't do it again.
Some people who experiment with drugs do not become dependent on them. It can happen to anyone, regardless of age. There are several factors that increase the risk of developing addiction, including family history. Nearly half of factors that influence your likelihood of becoming addicted are due to your genes. It is more likely that you will become addicted if your parents or siblings are struggling with substance abuse. Both men and women can develop an addiction. The first time you are exposed to drugs. Children's brains are still developing and drugs can affect this process. As you age, you might develop a drug addiction if you start using drugs young. Mental disorders. If a person is sad, has trouble paying attention or worries all the time, they are more likely to be addicted to a drug. In the hope of feeling better, you could self-medicate by taking medication. A history of trauma in your life increases the likelihood that you will become addicted. It is possible to have difficult relationships. If you come from a difficult home, it is possible to be more inclined toward addiction.
These are signs that you might have an addiction: You may be experiencing some or all these warning signs. An urge to use the drug daily, sometimes multiple times per day. You are putting in more drug than you intend to, and you keep it in your body longer than you intended. You should always have a supply of the medication and purchase it even if your finances prohibit you from purchasing it. Even if drugs cause you to have problems at work, or harm your family and friends, it is important that you continue using them. Spending more alone. Neglecting to take care of one's own hygiene and worrying about one’s appearance can lead to theft, lying or other risky actions like driving under the influence or engaging in unsafe sexual activity. Your time is spent obtaining the drug, using it or recovering from its effects. Quitting smoking can make you feel queasy.