Arizona MPJE (Pharmacy Jurisprudence) Practice Exam

Codeine is classified as a Schedule III controlled substance when its concentration does not exceed 60 mg per 5 ml or per 5 grams of the mixture. This classification is important in the regulation of substances to ensure that medications containing codeine are prescribed and dispensed appropriately, as they may pose a risk of abuse or dependence.

The limitations set for the concentration help to differentiate between forms of medication that may be used for therapeutic purposes versus those that might be misused. Therefore, the choice that states 60 mg in 5 ml is the correct reference point for the threshold that defines codeine's classification as a CIII substance.