Which of the following statements about over-the-counter and prescription medications is correct?

Many legal medications, including common over-the-counter products, can impair driving. Examples include antihistamines that cause drowsiness, sleep aids, some pain medications, anti-anxiety drugs, certain blood pressure medications, and many cold and allergy preparations. Federal regulations require commercial drivers to check medication safety before driving, and the regulations explicitly prohibit driving while using any substance that impairs ability. Some prescription medications are disqualifying for commercial driving entirely; others require a doctor's note confirming the driver can safely operate a commercial vehicle. Always read labels for warnings about driving or operating heavy machinery, talk to your doctor or pharmacist about medication side effects, and do not assume that legal means safe to drive on.