Anatomy of a PBS Schedule entry
Every PBS Schedule entry contains the following key fields. Understanding each one helps prescribers write valid PBS prescriptions and helps patients understand what they will receive.
Item code
Unique 5–6 character alphanumeric identifier for this specific drug/form/strength/pack combination. E.g., 2048M. Referenced on prescriptions and pharmacy claims.
Program
The PBS program under which the item is listed. Most items are "General Schedule" (PBS). Others include "Section 100" for
Highly Specialised Drugs (HSD) or "Repatriation" (RPBS).
Benefit type
One of:
Unrestricted,
Restricted benefit, or
Authority required. See
benefit categories for full detail. Determines clinical criteria and whether prior approval is needed.
Restriction text
For restricted and authority items: the clinical conditions, patient criteria, or treatment history required for PBS subsidy. Prescribers must certify these criteria are met.
Maximum quantity
The largest amount dispensable on a single script (e.g., 30 tablets, 500 mL). Cannot be exceeded on a PBS prescription without a private script.
Repeats
Number of additional dispensings allowed without a new prescription. Total supply = (repeats + 1) × maximum quantity.
Manner of administration
Route of administration for the listing (e.g., oral, injection, topical). Separate item codes exist for the same drug in different forms.
Brand / manufacturer
The brands listed for this item. Biosimilar and generic entries appear as separate items on the Schedule. The "a" flag (a) indicates brand substitution is permitted at the pharmacy.
PBS price
The maximum PBS benefit price — i.e., what the government pays the pharmacist (minus the co-payment). Medicines priced below the general co-payment threshold are dispensed at the medicine's actual cost.
Safety net recording
Whether the dispensing must be recorded for the patient's
Safety Net threshold accumulation. Most PBS items are Safety Net recordable.
Benefit types at a glance
Unrestricted
No clinical indication required on the prescription. Pharmacist can dispense for any reason a prescriber deems appropriate. Example: salbutamol inhaler for asthma/COPD.
Restricted benefit
Prescriber must certify (on the prescription) that the clinical criteria are met. No prior approval needed — compliance is prescriber's responsibility. Example: rosuvastatin for documented hypercholesterolaemia with CV risk.
Authority required
Prior approval from Services Australia (or streamlined approval via a streamlined authority code) required before dispensing. Subdivided into streamlined, telephone authority, and written authority. Example: adalimumab for rheumatoid arthritis. See authority prescriptions.
Brand substitution and the "a" flag
When a PBS listing has the "a" brand substitution flag, the dispensing pharmacist may substitute the prescribed brand for another brand-substitutable equivalent (generic or biosimilar) — unless the prescriber has written "brand substitution not permitted" on the script.
Prescriber marks "brand substitution not permitted"
Pharmacist must dispense the exact brand written. Patient may pay a brand premium if the brand costs more than the PBS price. Common for narrow TI drugs (phenytoin, ciclosporin) and some biosimilars.
Prescriber does not restrict substitution
Pharmacist may dispense any PBS-listed equivalent. Pharmacist should counsel the patient about the substitution. The patient saves nothing extra on co-payment (co-payment is fixed), but the government benefits from the lower brand price.
For biosimilar-specific substitution rules and the 35% price reduction policy, see biosimilars on the PBS.
Frequently asked questions
What is a PBS item code?
A PBS item code is a unique 5–6 character code (e.g., "2048M") identifying a specific drug + form + strength + pack size combination on the
PBS Schedule ↗. Each listing has its own code. Pharmacists use item codes to claim the PBS benefit from Services Australia. Find item codes via the
PBS medicine search ↗. Related:
authority prescriptions also reference item codes.
What does "brand substitution not permitted" mean on a PBS prescription?
"Brand substitution not permitted" instructs the pharmacist to dispense only the prescribed brand — no generic or
biosimilar substitution. Used for narrow TI drugs, biosimilars (stability concerns), or patient preference. If the branded price exceeds the PBS price, the patient may pay a brand premium. Related:
biosimilar PBS substitution policy and
generic vs brand-name drugs.
What is the maximum quantity and number of repeats on a PBS item?
Maximum quantity: the largest pack dispensable per script (e.g., 30 tablets).
Repeats: additional dispensings without a new script. Total supply = (repeats + 1) × maximum quantity. E.g., 30 tablets + 5 repeats = 180 tablets over time. Prescribers cannot exceed Schedule limits without a private prescription. For chronic conditions,
authority prescriptions sometimes allow greater quantities. See the
PBS Schedule ↗ for specific item limits.
What is a PBS restriction and how do I know if my prescription meets it?
PBS restrictions define the conditions under which a medicine is subsidised.
Restricted benefit: prescriber certifies the indication on the script.
Authority required: prior approval from Services Australia needed.
Unrestricted: any clinical indication. See
restricted vs unrestricted vs authority benefits for a full breakdown and examples. If criteria are not met, the prescriber must write a private prescription.