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Lesson 10 of 15
Effects of Alcohol and Drugs
3 hoursFull course
Course progress0/15 lessons · 0%
Learning Objectives
By the end of this lesson you'll be able to:
- 1Explain how alcohol and drugs impair perception, judgment, and reaction time.
- 2Describe how BAC rises and why only time lowers it.
- 3Recognize California's DUI and zero-tolerance laws and their penalties.
Step 1 of 4
A. Alcohol
Key Things to Remember
- Alcohol and drugs slow your reactions and wreck your judgment.
- Only time lowers your BAC — coffee, food, and showers do not.
- Under 21 it's zero tolerance (0.01%); 0.08% is a DUI for adults.
Content based on the 2025 CA Driver Handbook. Always verify current requirements at dmv.ca.gov.