Which of the following should be avoided when planning to drive?

Using medication that affects alertness should be avoided when planning to drive because such medications can impair cognitive functions and reaction times. Many prescription and over-the-counter medications can have side effects that make it difficult for a driver to concentrate, respond quickly to unexpected situations on the road, and maintain awareness of their surroundings. This impairment increases the risk of accidents, making driving unsafe.

On the other hand, drinking water, eating a balanced meal, and taking a short nap are generally beneficial for maintaining alertness and focus while driving. Staying hydrated, nourished, and well-rested contributes positively to overall cognitive function and reaction times, thus promoting safer driving practices.