Which medication is required to be stored behind the pharmacy counter?

Pseudoephedrine is a medication that is required to be stored behind the pharmacy counter due to its potential for misuse in the illegal manufacture of methamphetamine. The restrictions imposed by the Combat Methamphetamine Epidemic Act (CMEA) of 2005 mandate that products containing pseudoephedrine must be kept in a secure area, limiting over-the-counter access to prevent unauthorized purchase.

In contrast, medications like diphenhydramine, ibuprofen, and acetaminophen are available for over-the-counter sale and do not require the same level of control or restriction. These medications are typically considered safe when used as directed and do not have the same potential for misuse, which is why they can be displayed on store shelves for consumer access.