okay, I've got the bottle. It says it contains 30ml. and 1mg/ml. The directions on the bottle are 2 puffs each nostril twice a day. It's a metered spray.

So, they figured 8 puffs a day dispense 30ml in 30 days. Right? So, each day they were giving me 1 ml of fluid, which would contain one milligram of dexamethasone, or decadron.

Does that help?

In actuality, I took it at that dose from March through May, by which time I had Cushings Syndrome and saw an endocrinologist, who said I was being overdosed on this medicine.

Also, I found this: equivalents:

Prednisolone, 5
Prednisone, 5
Dexamethasone, 0.75
Methylprednisolone, 4