There is conflicting information about this, so I thought I'd share my experience. My first 3 vials came on prescription and were labelled: 'Prescription Only - Must be administered by a doctor'. Needing to get a loading dose, I have resorted to sourcing my own. The original chemist refused and Chemist Warehouse online says it's prescription only. However, I just bought 3 vials over the counter at a small independent pharmacy, no questions asked. I would recommend anyone who has been refused supply without a prescription to just try another pharmacy!