Initial Use – Also known as experimentation or ‘trying it for the first time’ stage. To develop an addiction, you have to try that substance first. This usually takes place around friends under ‘peer pressure’ situation. Many newcomers, usually teenagers and youngsters, are curious about new drugs, and they think to themselves, “I will give this drug a try and see what happens.” Alcohol and prescribed medicines are the most frequently used and abused substances that develop an addiction. However, not ever first-timer will become an addict personality.

Abuse/Prolonged Use – It is reported that after the first time, the person will continue to use the substance again more often. The more you enjoy the trip the substance gives you, the more your brain will want you to keep taking it. There is the reason we take a drink or two after a long day or take Aspirin if we have a headache.

Your own body will tell you that a particular drug is required to feel better. You might do not realize any signs of addiction just yet. At this stage, a person can even take a long break from substance use and still don’t feel any withdrawal symptoms.

Tolerance – When a person is exposed to a certain substance for an extended period, his brain undergoes certain changes that give birth to ‘tolerance.’ This condition is defined by Merck Manuals as one in which the original amount of substance no longer has the same psychological and physical effects. This results in increasing the dosage or frequency of using a substance in order to attain the same high. It works for a while, but with time your brain again develops a tolerance and gets used to the new dosage.

Tolerance is a sign that your brain has changed its response to the substance, resulting in loss of several chemical receptors or reduction in chemical processes.

Dependence – When you have been using the substance for a long period, your body becomes dependent on it. You often develop withdrawal symptoms when you take a break from consumption. It is at this stage when your body experiences the adverse effects, including vomiting, muscle cramps, cold sweat, insomnia, depression, heart palpitations, and so on. In worst cases, not taking the substance might result in strokes, heart attacks, or even death. Intervention from a family member, friend, or an expert becomes necessary at this stage.

Addiction – Addiction is a chronic condition that includes uncontrollable and irresistible cravings for a substance. During this stage, an addict experiences several physical and psychological symptoms. These symptoms are also noticed by family members and friends of an addict. Some of these symptoms include: