What stipulation applies to the sale of Sudafed?

The stipulation that applies to the sale of Sudafed is that it must involve providing personal identification. This requirement stems from the regulations surrounding pseudoephedrine, the active ingredient in Sudafed, which is closely controlled due to its potential use in the illicit manufacture of methamphetamine.

In many jurisdictions, including Tennessee, purchasers of pseudoephedrine-containing products are obligated to show a valid form of identification—such as a driver's license or state ID—at the time of purchase. This measure serves to track sales and limit the amount that individuals can buy, thereby reducing the possibility of abuse.

The other options, while relevant to the sale of certain medications or practices in pharmacy, do not specifically apply to the regulation of Sudafed. For example, while a pharmacist may need to counsel patients on certain medications, having a pharmacist present is not a specific requirement for all OTC medications like Sudafed. Additionally, there are no age restrictions set at 21 for purchasing this medication in Tennessee, and storage of Sudafed does not have specific guidelines prohibiting it from being near other OTC drugs. Thus, the requirement for personal identification is the key regulatory aspect for the sale of Sudafed.