180mg a day would be too much I think. It sounds like a tapering dose from 60mg down would be about right.
i took 75 for 3 days then tapered down when I had my (not) Bells palsy.
The thing with pred is that it only reduces a swelling. If your numbness is from nerve damage then pred would not work would it? If its caused by inflammation, say from a spinal lesion/swell, then maybe it would help. my neuro has often said that pred would be of no use for numbness.
Or it's quite probable that I'm talking absolute pants and got it all wrong.
take it easy anyway.