Same shape here, different drug. The thing that helped was documenting the refusal rather than re-arguing it. They refer rather than write.

Reconstitution arithmetic is only half the problem. The other half is what was in the vial.

I would take the narrow conclusion. Broad ones are more interesting and less true.

Worth repeating that this is not medical advice and the answer often depends on who you are.

Changing prescriber does not reset anything, and people discover that the hard way.

Three month limits are cumulative across parcels in more places than people realise.