What effect might alcohol and another drug have when combined in your blood?

  1. Increase the effects of both ✓
  2. Have no effect on driving ability
  3. Reduce the effects of the drug or medicine
  4. Reduce the effects of the alcohol

Answer: A. Increase the effects of both

Combining alcohol with another drug can increase the effects of both.

Why this is the answer

The handbook says never to drink alcohol while taking other drugs because the combination can be dangerous and often makes the alcohol and the other drug stronger. It gives the example that one drink with a cold remedy could affect you like several drinks. The manual also says mixing alcohol and other drugs severely reduces your ability to drive. That supports the idea that the effects of both are increased, not canceled or reduced.

Why the other answers are wrong

Remember it

Picture alcohol plus another drug as one plus one becoming more than two: both effects get stronger.

Official handbook: New York State Driver's Manual (MV-21), Chapter 9: Alcohol and Other Drugs – Other Drugs

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.