What if predisones doesn't help for temporal arteritis?

Usually does!: Prednisone usually helps. But the damage caused by the condition may not be reversible with prednisone treatment. Headache, fatigue, etc. should improve with prednisone (usually required long term with slow taper). If there is vision loss or changes, it is usually permanent.

Rare: Prednisone is veryy effective, and the3 dosge can be manipulated to reduce the inflammatory process. In the RARE case it does not work, several other antimetabolite medications are available