MRCP2-0663

MRCP2-0663

A 35-year-old woman is brought to the emergency room by her husband. He found her unconscious and surrounded by empty bottles of aspirin. She had been feeling depressed for the past few weeks. On examination, her blood pressure is 120/80 mmHg, pulse is 90 bpm and regular. She is breathing normally with saturations of 98% on air. The abdomen is soft and non-tender. Investigations (blood tests) reveal the following:
Haemoglobin (Hb) 140 g/l (normal range: 120-160 g/l)
White cell count (WCC) 8.5 × 109/l (normal range: 4.0-11.0 × 109/l)
Platelets (PLT) 250 × 109/l (normal range: 150-400 × 109/l)
Sodium (Na+) 138 mmol/l (normal range: 135-145 mmol/l)
Potassium (K+) 4.2 mmol/l (normal range: 3.5-5.0 mmol/l)
Bicarbonate (HCO3-) 22 mmol/l (normal range: 22-28 mmol/l)
Creatinine (Cr) 80 μmol/l (normal range: 50-90 µmol/l)
pH 7.38 (normal range: 7.35-7.45)
What is the most appropriate next step in management?