A prescription calls for amoxicillin 500 mg PO t.i.d. Which of the following must be provided by the prescriber in order for the prescription to be filled?

While contraindications are important for patient safety and should be considered by the prescriber, they do not need to be explicitly included on the prescription itself. The prescriber is expected to be aware of the patient's history and any potential contraindications before writing the prescription, making this information less critical for the pharmacist.

Auxiliary warnings may be beneficial for the patient’s understanding of potential side effects or interactions, but they are not a mandatory requirement for filling the prescription. Pharmacists can provide verbal or written warnings based on standard practices and the specific medication being dispensed.

The brand name of the medication is not required for the prescription to be processed. Prescriptions can be filled using generic names, and many health care providers choose to prescribe medications this way to promote cost-effectiveness. The active ingredient is what fundamentally matters for filling the prescription.