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The physiological and behavioral effects of alcohol are measured by the blood alcohol concentration.

Smokeless tobacco users have an increased risk for dental problems and loss of teeth.

A commonly used (and the least expensive) method of drug testing is the urine test.

Cirrhosis of the liver is generally caused by long-term heavy alcohol consumption.

Why does marijuana present clear dangers in regard to driving while under the influence?

Which drug is used most commonly used illicit drug in the United States?

Which of the following is true about over-the-counter (OTC) drugs?

Which of the following represents the greatest economic cost to society caused by tobacco use?

The likelihood of a driver being involved in a fatal crash rises significantly with a BAC of 0.05 percent and even more rapidly after what percent?

A physiological tolerance to one drug that reduces the effects of another drug is