What characterizes Schedule III drugs?

Schedule III drugs are characterized by their regulation requiring a prescription for use, while being considered less addictive compared to Schedule I and II substances. This classification reflects substances that have a legitimate medical use but present a moderate potential for physical dependence or high potential for psychological dependence.

In the context of the scheduling system, Schedule I drugs are deemed to have no accepted medical use and a high potential for abuse, whereas Schedule II drugs are highly addictive and also prescribed but are subject to stricter regulations. Therefore, the key distinction for Schedule III drugs is that they can be prescribed and have a lesser degree of addictive potential than those in the higher schedules.

The other options do not accurately describe Schedule III drugs. Some drugs in this category may still pose a psychological dependence risk; hence, stating that they are "not addictive psychologically" is misleading. Additionally, labeling them as "least addictive" does not provide the complete context regarding their scheduling and medical classification. Finally, suggesting that they are "available over the counter" is incorrect because Schedule III drugs strictly require a prescription, separating them from non-prescription medications.