Which of the following over-the-counter products contains ephedrine and is not classified as a dangerous drug?

The choice of Primatene as the correct answer is based on its ingredients and classification. Primatene is an over-the-counter product that contains ephedrine, which is used primarily for the relief of bronchial asthma. Unlike many medications that contain ephedrine and are classified as dangerous drugs due to their potential for abuse or severe side effects, Primatene is specifically designed for consumer accessibility in managing asthma symptoms without requiring a prescription.

This distinguishes it from other options listed, as Allegra and Claritin are antihistamines that do not contain ephedrine, and NyQuil is primarily a cold and flu remedy that also lacks ephedrine. This classification reinforces the regulatory standards surrounding the sale and use of certain substances in over-the-counter medications. Understanding the specific functions and classifications of these products helps in comprehending which over-the-counter medications are safe and accessible for public use.