How to spell DXITAINE correctly?

If you meant "dexamethasone", the correct spelling would be d-e-x-a-m-e-t-h-a-s-o-n-e. If you meant "dextromethorphan", the correct spelling would be d-e-x-t-r-o-m-e-t-h-o-r-p-h-a-n. If you meant something else entirely, please provide more context.