Final answer:
Controlled substance prescriptions must be written by a licensed professional, such as a doctor or pharmacist. Pharmacists dispense drugs that have been prescribed by a doctor and provide valuable services in support of everyone's health.
Step-by-step explanation:
Controlled substance prescriptions must be written by a practitioner acting in their professional capacity, such as a licensed doctor or a pharmacist. A pharmacist dispenses drugs that have been prescribed by a doctor. They must hold a doctorate in pharmacy and be licensed by the state in which they work.
Pharmacists can advise physicians on drug selection, dosage, interactions, and side effects, as well as advise patients on the proper use of their medications.