What does it indicate when a medication is classified by the FDA as a schedule II drug?

A medication classified by the FDA as a schedule II drug indicates that it has a high potential for abuse, which can lead to severe psychological or physical dependence. This classification is part of the Controlled Substances Act, where drugs are categorized based on their potential for abuse and accepted medical use. Schedule II medications are tightly regulated and can only be prescribed with a written prescription; refills are not allowed, emphasizing the seriousness of their potential for misuse.

The other choices do not align with the criteria for schedule II drugs. Medications being available over the counter pertains to non-prescription drugs, while the need for refrigeration and the restriction to chronic conditions are not defining features of this classification. Thus, the correct understanding revolves around the issue of abuse potential and the implications that come with it regarding prescribing and usage.