What are the rules are a medicinal cannabis flower limit? I've heard the max is 60g/month.

Unfortunately, if you've been told that there is a specific maximum limit that a practitioner may prescribe in a specific state, someone hasn't told you the truth.

The practices of prescribers of unregistered medicinal cannabis and schedule 8 medicine are under scrutiny by several regulators including AHPRA who regulates GP and NP licenses. There is a large concern around over prescribing and the true clinical need for individuals using high quantities of medicines with THC being the main ingredient.

As a result many clinics/practitioners have made the decision to reduce their general limit of medicinal cannabis flower to 60g per month.

While there is no technical limit, there is guidance that states that no more than 60g flower should be required for a given patient when a practitioner uses certain Authorisations to prescribe. Prescriber limits, however, are based on the clinical justification by the practitioner when applying for or using their Authorisations.

It's also important to remember that while cannabis has been used by people for thousands of years with no reported deaths, in Australia, medicinal cannabis is regulated as an unapproved s8 medication and is in the same class as opiates and other highly regulated medications. The regulatory bodies see all of these products as having a similar safety profile and scrutinise practitioners in the same way when they are prescribing either.