The nurse is assessing a client with Addison's disease. Which finding requires immediate intervention as it may indicate an impending Addisonian crisis?

✓ Correct Answer: Option C

Severe hypotension and a rapid, weak pulse are hallmark signs of an Addisonian crisis, a life-threatening emergency caused by acute adrenal insufficiency. This requires immediate medical intervention, including fluid resuscitation and glucocorticoid replacement.