(HealthDay News) -- Nicotine is a highly addictive drug, and many people who chew tobacco don't realize that it can be even more addictive than smoking. According to the U.S. National Institutes of Health, many brands of chew contain more nicotine than cigarettes.
The agency offers this quiz to demonstrate how addicted you may be:
The more items that apply, the more likely you are addicted, the NIH says.