Which of the following conditions allows a medication to be considered patient supplied?

A medication is considered patient supplied when it is provided by the patient themselves rather than being dispensed by a pharmacy. In this context, the correct choice involves a situation where a physician orders a non-formulary product that is not interchanged. This implies that the medication the patient is bringing in is not part of the standard formulary (the approved list of medications) and, because it is not interchangeable, it suggests that the patient has provided it from their own supplies.

In scenarios where a physician orders a formulary product, the medication is likely to be sourced from the pharmacy and not from the patient. Similarly, if a physician substitutes a medication without consent, it typically indicates that an alteration has been made within the pharmacy's jurisdiction rather than involving a patient-supplied medication. Lastly, if a pharmacist decides a medication is needed, it implies an action taken by the pharmacy rather than relying on the patient to provide medication, thus excluding the concept of patient-supplied. Therefore, the correct choice accurately reflects the condition under which a medication can be classified as patient supplied.