New York CDL Practice Test

Many over-the-counter medications that are commonly used to relieve cold symptoms contain antihistamines, which are known to cause drowsiness as a side effect. This is particularly true for first-generation antihistamines, such as diphenhydramine and chlorpheniramine, which can cross the blood-brain barrier and affect the central nervous system, leading to sleepiness. In addition to antihistamines, some cold medications also contain ingredients that can relax the body or have sedative properties, further contributing to feelings of tiredness. Users of these medications should be aware of this side effect, especially if they need to perform tasks that require full alertness, such as driving. The statement is accurate because it highlights the potential sedative effects of these medicines when used for cold symptoms. While other options may address nuances like the influence of alcohol or variations among brands, the overall characteristic of common cold medicines causing sleepiness applies broadly to many medications in this category.