What is the maximum amount of non-prescription schedule V medication a person can purchase at once according to federal law?

The correct answer is based on federal regulations emphasizing the limits on the sale of non-prescription schedule V medications. According to federal law, a person may purchase a maximum of 48 dosage units of a non-prescription schedule V controlled substance at one time. This limit is in place to prevent potential misuse or abuse of these substances, while still allowing legitimate access for those who need them for medical purposes.

The specific dosage units can be any combination of products that fit within that limit, reflecting an understanding of the balance between controlling substances with potential for abuse and ensuring that patients have access to necessary medications. This regulation is part of the Controlled Substances Act (CSA) and is designed to encourage responsible use and distribution of controlled substances across retail settings.