Short answer: S3 and S4 are different Australian supply schedules. TGA guidance describes S3 therapeutic vapes at 20 mg/mL or less for adults where state or territory law permits, while S4 supply requires a prescription and an applicable access pathway. A schedule is not a personal recommendation or a guarantee that a pharmacy will stock the product.
The S3 baseline
Under the TGA pharmacy guidance, a pharmacist may supply an S3 therapeutic vape to an adult aged 18 or over where the federal conditions and local law allow it. The product must be on the notified list, the purpose must be smoking cessation or management of nicotine dependence, and the concentration must not exceed 20 mg/mL (S1). The pharmacist must assess clinical suitability and discuss alternatives.
The S4 baseline
S4 supply is prescription medicine supply. The TGA says a valid prescription from a medical or nurse practitioner is required, together with an SAS or Authorised Prescriber pathway as applicable (S1). A prescription does not remove the need for the product, indication, state law and pharmacy process to line up.
A quick decision table
| Question | What it helps clarify | What it cannot prove |
|---|---|---|
| Is nicotine at or below 20 mg/mL? | Whether the federal S3 concentration boundary may be relevant. | That S3 supply is allowed in every state. |
| Is the product on the notified list? | Whether the pharmacist can check the notified-good pathway. | Safety, effectiveness or stock. |
| Is a prescription required? | Whether the conversation is an S4 pathway question. | That a pharmacy must dispense it. |
Important limits
Zero-nicotine vaping goods are still vaping goods under the TGA pharmacy guidance, and pharmacists are not compelled to stock therapeutic vapes (S1). States and territories can add controls, so a national summary cannot answer every local scenario. This article does not advise on nicotine dose, treatment or whether vaping is right for you.
Bottom line
Take the exact product information to a pharmacist and ask whether the current S3 or S4 pathway applies. Do not use a retailer label, an old article or a product category page as a substitute for current official guidance. The existing Australian prescription guide provides adjacent context.
References
- Supplying therapeutic vapes in pharmacies (accessed 18 August 2026).
- Australian Government vaping laws (accessed 18 August 2026).
- VAPESTOREOZ nicotine prescription guide (accessed 18 August 2026).
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