Final answer:
Patients with Addison's disease are at risk of developing an adrenal crisis, which can cause vomiting, abdominal pain, leg cramps, hypotension, and shock. They may also experience electrolyte imbalances such as hyponatremia and hyperkalemia.
Step-by-step explanation:
A patient with Addison's disease is at increased risk for an adrenal crisis. Symptoms of adrenal crisis include vomiting, abdominal pain, back or leg cramps, and severe hypotension leading to shock. Additionally, patients with Addison's disease may experience electrolyte imbalances such as hyponatremia (low blood sodium levels) and hyperkalemia (high blood potassium levels).