Welcome to HCM
This dug belong to corticostreroid,it is not clear by your description why he is taking this drug ,I mean which disease he is suffering as for body pain
it is not a analgesic
. Certainly steroids
have lot of side effects specially as he is 92 years old. Please consult a Physician and if he has some disease which needs steroid then a Once a day oral dose on alternet day may be given to keep his disease under control, and along with that a oral calcium and vitamin D3
may be given to keep his bones healthy.
Good luck to him