What warning is imperative on the label of an OTC product?

The imperative warning on the label of an over-the-counter (OTC) product is to include warnings for adverse reactions. This requirement is crucial for ensuring consumer safety, as it informs users of potential serious effects that may arise from using the product. Adverse reactions can lead to significant health risks, and by providing this information prominently on the label, the manufacturer helps to mitigate the risk of harm by allowing consumers to make informed decisions about whether to use the product based on their health status and sensitivity to certain ingredients.

While information on possible side effects and alternatives to the product may also be relevant, they do not carry the same level of urgency as warnings for adverse reactions. Consumers may be more assured of the safety of a product if they are made aware of the specific risks associated with it. Therefore, emphasizing adverse reaction warnings ensures a higher standard of consumer protection and aligns with regulatory expectations for OTC labeling.