Quick answerUse
emergency hydrocortisone and seek emergency care now.
Why this is correctPersistent vomiting blocks oral replacement and, with weakness and dizziness, raises concern for evolving adrenal crisis. Parenteral glucocorticoid and fluid resuscitation must not wait for oral tolerance to return.
Easy analogy or mental pictureThe body has lost its cortisol backup generator; the emergency injection starts the generator while help is activated.
Memory hookCannot keep steroids down: inject and go.NCLEX decision ruleWhen a life-sustaining medication cannot be absorbed and crisis cues appear, use the emergency route and escalate immediately.
Why the other choices are wrongSkipping replacement worsens cortisol deficiency, oral dose stacking is unreliable during vomiting, and fluid restriction worsens volume depletion.
References
1Endocrine Society: Primary Adrenal Insufficiency GuidelineEmergency parenteral hydrocortisone and crisis-prevention education