I've never heard of any medication helping with prednisone side effects. Call me skeptical.
Prednisone is synthetic Cortisol. Cortisol is a natural hormone our body uses to regulate our sleep cycle, cortisol is highest in the early am when we wake up and lowest when we go to bed and fall asleep. Cortisol is a mild pain reliever taking care of small aches and pains we'd other wise experience. While we're on high dosages of prednisone, our body ceases producing cortisol and the adrenals go to sleep. As we taper down pred, the adrenals should reawaken and resume cortisol production, if they do not then we experience withdrawal. So pred withdrawal symptoms are generally limited to aches/pains, and drowsiness/fatigue.
You can always consult with an endocrinologist-specialist doctor (specializing in hormones) if she continues to have troubles with the taper. Endocrinologists will say you should never experience withdrawal when a pred taper is done correctly (and most gasteroenteroligists are clueless with it).
Moderator Ulcerative Colitis
John, 40, UC Proctosigmoiditis
Rx: Remicade @5mgs/kg/6wks; daily 75mgs 6MP, 4.8g generic-Lialda, and rowasa
With UC, we're much like a footballer on our way to the bathroom: running, jumping over and agilely dodging around obstacles, and knocking out-of-the-way all that are in our path to the end-zone.