Which of the following is required information on the label of an OTC product?

The requirement for including side effects on the label of an Over-the-Counter (OTC) product is established by regulatory guidelines to ensure consumer safety. This information is critical as it informs users about potential adverse reactions they may experience when using the product. The presence of this disclaimer allows consumers to make informed choices about their health and safety, helping them to recognize when to seek further medical attention if side effects occur.

Understanding the importance of this information reflects regulatory compliance, specifically the guidelines set forth by the FDA regarding labeling for consumer medications. Providing side effects empowers consumers to use the product responsibly while being aware of any risks associated with it.

Other items, such as a manufacturer's history, product pricing, or information about competing products, do not directly contribute to consumer safety or informed usage in the same way that side effects do. Therefore, they are not mandated to be included on the label of OTC products.