Many people think drug addiction, dependence, and tolerance are pretty much the same thing. But in fact, each term means something very different about how drugs affect a person’s body and brain. Learning the difference is important.
Tolerance happens when a person no longer responds to a drug in the way they did at first. So it takes a higher dose of the drug to achieve the same effect as when the person first used it. This is why people with substance use disorders use more and more of a drug to get the “high” they seek.
Dependence means that when a person stops using a drug, their body goes through “withdrawal”: a group of physical and mental symptoms that can range from mild (if the drug is caffeine) to life-threatening (such as alcohol or opioids, including heroin and prescription pain relievers). Many people who take prescription medicine every day over a long period of time can become dependent; when they go off the drug, they need to do it gradually, to avoid withdrawal discomfort. But people who are dependent on a drug or medicine aren’t necessarily addicted.
Unlike tolerance and dependence, addiction is a disease; but like tolerance and dependence, addiction can result from taking drugs or alcohol repeatedly. If a person keeps using a drug and can’t stop, despite negative consequences from using the drug, they have an addiction (also called a severe substance use disorder). But again, a person can be dependent on a drug, or have a high tolerance to it, without being addicted to it.
Need addiction treatment for you or a loved one?
Florida Center for Recovery in Port Saint Lucie County offers medical detox and comprehensive inpatient therapeutic programs to treat addiction and its underlying related mental health conditions. We offer innovative therapies to address the multidimensional aspects of the disease of addiction while teaching personal accountability in a safe, nurturing, real-life environment.
To explore addiction treatment options, please call (800) 851-3291. All calls are private and confidential.