Substance abuse differs from addiction. Many people with substance abuse problems are able to quit or change their behavior.

Addiction is a disease that affects your brain and behavior. With drug addiction, you can’t resist the urge to use them.

 If you’re worried that you or a loved one may have an addiction, there are signs to help you know.

"Addiction,” “tolerance,” and “physical dependence” are often used interchangeably. But they don’t mean the same thing.

Alcohol use disorder (AUD) is a chronic illness in which you can’t stop or control your drinking.

Are you falling for common misconceptions about alcohol use disorder?

No one becomes addicted to alcohol overnight. You don’t catch alcoholism the way you do the common cold.

If you've had two or three of these symptoms in the past year, that’s a mild alcohol use disorder.

A national health crisis, 3 million people in the U.S. have opioid use disorder (OUD), or they’ve had it in the past.

According to the National Center for Drug Abuse Statistics, 3.8 percent of American adults abuse opioids each year.

Fentanyl is a human-made opioid used to treat severe pain. It's 50 to 100 times stronger than morphine.

Heroin is a drug that comes from a flower, the opium poppy, which usually grows in Mexico, Asia, and South America.

Marijuana misuse can have dire consequences if left untreated. It’s possible to misuse it and get addicted to it.

Despite increasing acceptance, marijuana use does have some risks. Here's a look at how marijuana can affect your health.

Marijuana has mind-altering compounds that affect both your brain and body. It can be addictive, and it may be harmful.

Long-term use of cannabis can reduce the effects of its intoxication. So you can develop a tolerance for the drug.

Prescription drug abuse is when you take a medication for a reason other than why the doctor prescribed it.

Addiction is a complex disease brought on by many reasons, including your lifestyle and genes.

Opioid meds do relieve back pain for short periods, but they're strong -- and they come with some serious risks.

Percocet is a mix of acetaminophen and oxycodone. Taking it doesn't come without side effects.