The quantity for controlled substances must be written in which formats?

The correct answer involves the requirement for quantities of controlled substances to be documented in both numerical and alphabetical formats. This practice is essential for preventing misunderstandings or alterations to prescriptions, which can have significant implications for patient safety and compliance with regulations.

Using both formats helps ensure clarity and accuracy. For instance, if a quantity is written as "10" in numeric form, it would also be required to be explicitly written as "ten" in alphabetical form. This redundancy acts as a safeguard against tampering: if someone were to alter the numeric figure, the alphabetical writing serves as a verification method that can help confirm the intended quantity.

Additionally, regulatory bodies and standards set forth for prescribing controlled substances emphasize this dual-format requirement. By adhering to this practice, pharmacy professionals can minimize errors and maintain the integrity of the prescription process.