Which of the following is an example of prescription fraud?

Using a fake prescription is an example of prescription fraud because it involves the intentional deception and misuse of the healthcare system for the purpose of obtaining controlled substances unlawfully. This act typically involves creating a forged document that imitates an authentic prescription to mislead pharmacists or healthcare providers into dispensing medications that the individual is not legitimately entitled to.

In contrast, refilling a valid prescription is permissible as long as it is done in accordance with the regulations governing prescriptions, and the medication is still appropriate for the patient's condition. Administering medication without supervision usually involves issues of protocol or legality, especially in a healthcare setting, but does not directly pertain to the act of fraud associated with prescriptions. Keeping medication from a previous prescription can relate to medication management or misuse; however, this behavior does not inherently involve the fraudulent creation of prescriptions, which is the core definition of prescription fraud.