Which statement best describes the natural history of substance use disorders in adolescence?

Which statement best describes the natural history of substance use disorders in adolescence?

• A. Experiences usually begin in adulthood
• B. Early use of gateway drugs and preoccupation in adolescence is common
• C. All individuals stop using by age 18
• D. Substance use never leads to dependence

Answer: (B)

The main idea here is how substance use tends to develop during adolescence. In teens, experimentation often starts with substances commonly labeled as gateway drugs—things like alcohol, tobacco, and marijuana—and, over time, there is growing preoccupation with using. This combination—early initiation and increasing focus on obtaining and using substances—fits the common developmental trajectory seen in adolescence, influenced by ongoing brain development and social factors such as peer pressure and availability. That’s why this statement best describes the natural history. Other options don’t fit as well: many individuals begin during adolescence, not primarily in adulthood; quitting by a fixed age like 18 isn’t universal, and some continue or progress beyond adolescence; and that use never leads to dependence is not accurate, since continued use can and does lead to dependence in some teens.

The main idea here is how substance use tends to develop during adolescence. In teens, experimentation often starts with substances commonly labeled as gateway drugs—things like alcohol, tobacco, and marijuana—and, over time, there is growing preoccupation with using. This combination—early initiation and increasing focus on obtaining and using substances—fits the common developmental trajectory seen in adolescence, influenced by ongoing brain development and social factors such as peer pressure and availability. That’s why this statement best describes the natural history.

Other options don’t fit as well: many individuals begin during adolescence, not primarily in adulthood; quitting by a fixed age like 18 isn’t universal, and some continue or progress beyond adolescence; and that use never leads to dependence is not accurate, since continued use can and does lead to dependence in some teens.