Some changes are expected, but certain signs should trigger a call. Repeated vomiting, black/tarry stool, sudden weakness, collapse, or a dog that cannot keep water down needs prompt veterinary advice. Extreme panting with distress, severe behavior change, or signs of infection (new fever, pus, painful skin lesions) also matter because steroids can blunt normal immune responses. If a dog is tapering and becomes abruptly very ill, the clinic needs to know immediately rather than waiting for the next scheduled step.
Owners can make the call more productive by sharing specifics: how much the dog drank compared to usual, how many times the dog urinated, whether appetite is increased or absent, and whether stool color changed. If possible, bring photos of stool or skin lesions and a list of all medications given in the last week. Clear details help the veterinarian decide whether this is a manageable side effect or a true complication.