Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Family members or caregivers may benefit from emergency training.
These concerns usually need timely review but are not necessarily emergencies when the person is otherwise stable.
Repeated vomiting, collapse, confusion, severe weakness, or inability to take replacement medicine requires emergency care.
Contact the treating team promptly for repeated dizziness, weight change, persistent fatigue, new swelling, rising blood pressure, or uncertainty about illness dosing.
Regular follow-up is usually coordinated by an endocrinology team.
Visits may review energy levels, weight, blood pressure while sitting and standing, dizziness, salt craving, swelling, sleep, and signs of too much or too little replacement.
Follow-up should also include a review of sick-day rules, injection technique, medicine supplies, medical identification, and plans for travel or procedures.
The article also says
Blood tests may be used to monitor electrolytes and other health conditions.
Treatment decisions are based on the overall clinical picture rather than a single cortisol measurement while taking replacement medicine.
Every sign above is quoted from the sofidex article on Addison disease. If you are not sure, err upward — it is always reasonable to be checked.