If there was a difference in the giddiness in different positions of head during Apley's maneuvre then it is likely to be vertigo
. However physician doing the maneuvre can best judge it. Lowering dose of prednisolone
usually does not cause dizziness
, if the dose reduction is slow. Apart from that electrolyte disturbances in blood as result of prednisone
can sometimes cause dizziness. She needs to be evalauted by a physician for making a conclusion.