What people often referred to as drug addiction is synonymous to the diagnosis of substance dependence. When a person shows either tolerance or withdrawal from the substance, the person shows physiological dependence on the substance. When a person experiences less and less effect from the same dose of substance and needs greater and greater doses of a substance in order to achieve intoxication, this shows tolerance. On regards to people who smoke, 20 cigarette sticks would make a person who just recently smokes to get violently ill while people who have smoked cigarettes for years would have no problem with that amount of sticks. A person who is highly tolerant to a substance may have a very high blood level of the substance without being aware of any effects of the substance. For example, people who are very tolerant to alcohol may have blood-alcohol levels far more than those used in the legal description of intoxication but illustrate few signs of alcohol intoxication. From one substance to the next, the risk of tolerance varies. Cannabis and PCP shows lower risks for tolerance while alcohol, opioids, stimulants, and nicotine have high risks for tolerance.

People who are physiologically dependent on substances often show severe withdrawal symptoms when they stop using the substances. The symptoms may be so severe that the substances must be withdrawn gradually in order to prevent the symptoms from becoming overwhelming or dangerous. These people may take the substances to relieve or avoid withdrawal symptoms. For example, a person dependent on alcohol may have a drink first thing in the morning to relieve the withdrawal symptoms.

However, a diagnosis of substance dependence does not requires physiological dependence (i.e., evidence of tolerance or withdrawal). Despite the experience of significant social, occupational, psychological, or medical problems as a result of the use , the diagnosis may be given when a person compulsively uses a substance .

When the craving of the substance is so strong, once a substance dependence person starts craving for the substance, they will do almost anything like stealing, lying, and prostituting themselves. Obtaining and ingesting the substance may be the center of the lives of these people. The cycle of going back to the substance again and again will always happen despite having the attempt on cutting back or quitting the use of the substance.

It has always been a fact that drug addiction or drug dependence is bad and carries many negative consequences. Staying away from addictive substances will always be the smart move. However, if you happen to know someone who has failed to stay away from it, there is still a way to help that person lessen the bad effects of drug addiction. This is done through going in a drug rehab. How does drug rehab help in this kind of situation? Drug rehab offers different procedures that have a very high assurance to help one get out from the hells of drug addiction. What are you waiting for? Contact your local hospital and see what drug rehab procedures they can offer.

Substance dependence gives many negative consequences to the society and the effective way to solve these negative consequences is by going through a drug rehab.