Which of the following is the maximum dosage units of any substance containing opium that can be dispensed without a prescription?

The maximum dosage units of any substance containing opium that can be dispensed without a prescription is limited by federal regulations to ensure safety and prevent misuse of opiate-containing products. Specifically, the correct option indicates that up to 48 dosage units can be dispensed without a prescription, aligning with the legal framework designed to restrict access to potentially harmful substances while allowing for some degree of over-the-counter availability for therapeutic use. This regulation not only promotes public health safety but also facilitates responsible use of medications that contain opium derivatives. Understanding these limits is crucial for pharmacists and healthcare providers to comply with regulations and ensure they are practicing within the law while providing necessary care to patients.