What symbol indicates that a medication is controlled?

The symbol that indicates that a medication is controlled is "C." This "C" represents "Controlled Substance" and is used to signify that the medication falls under specific regulations due to its potential for abuse or dependence. Controlled substances are classified into schedules by various regulatory agencies, reflecting their risk levels and medical usefulness.

Medications that are classified as controlled substances require stricter prescribing and dispensing practices, making the "C" a vital symbol for healthcare providers, patients, and pharmacies to recognize the level of control and caution needed when handling these drugs. This helps ensure that such medications are appropriately monitored and prescribed only when necessary, reflecting the legal and ethical implications inherent in their use.