A written order or refill notice issued by a licensed medical professional for drugs which are only available through a pharmacy.
OTHER USES -- "directions prescribed beforehand; the action of prescribing authoritative rules or directions; "I tried to follow her prescription for success" --
prescription(a): available only with a doctor's written prescription; "a prescription drug" --
written instructions for an optician on the lenses for a given person --
written instructions from a physician or dentist to a druggist concerning the form and dosage of a drug to be issued to a given patient
More Examples of Prescription:
A medical prescription (RX) is an order (often in written form) by a qualified health care professional to a pharmacist or other therapist for a treatment to be provided to their patient.
Further details - Prescription:: Search Rx List