Final answer:
In medicine, the DSM-5 classification system is used for psychiatric medication classification, while the ATC system is used internationally. For quality control, precision scales for physical measurements are utilized in pharmaceutical settings. Additionally, legal classification like the Controlled Substances Act schedules drugs based on abuse potential and medical use.
Step-by-step explanation:
The classification of prescriptions would generally involve the DSM-5: Classification and criteria changes scale in medicine, particularly in the context of psychiatric medications. This is approaching pharmaceutical classification from a diagnostic perspective. However, if we are discussing the scale as in measurement of the quantities of medication, such as in quality control, then the scale used refers to a physical measurement tool, which in the pharmaceutical industry would be precision scales capable of measuring milligrams to kilograms, as accuracy in medication dosage is vital for producing safe and effective products.
Pharmaceutical drugs can also be classified based on the Anatomical Therapeutic Chemical Classification System (ATC), which is a more comprehensive method of classifying drugs internationally. Furthermore, specific regulations like the Controlled Substances Act in the United States use a classification system that schedules drugs from I to V based on their potential for abuse, medical use, and safety or dependence liability.