What common effect can prescription medications have when combined with alcohol?

When prescription medications are combined with alcohol, they can enhance the effects of alcohol, which is why the chosen answer is accurate. This interaction can lead to increased sedation, drowsiness, and impairment, as many medications can potentiate the depressant effects of alcohol on the central nervous system. This can create significant risks, including increased chances of accidents or adverse health effects.

It's important to recognize that not all medications interact with alcohol in the same way; some might have different effects when combined. However, the potential for enhanced effects is a common concern that underscores the need for caution when mixing these substances.