MSFinals-4860

MSFinals-4860

A 70-year-old man presents to the Emergency Department with anorexia, fatigue, nausea and generalised pain. He has a medical history notable for palliate prostate cancer for which he has refused treatment, and remains independent. Routine blood results confirm your suspicions:
Investigation Result Normal value
Haemoglobin 89 g/l 135–175 g/l
White cell count (WCC) 8.5 × 109/l 4–11 × 109/l
Platelets 200 × 109/l 150–400 × 109/l
Sodium (Na+) 138 mmol/l 135–145 mmol/l
Potassium (K+) 4.0 mmol/l 3.5–5.0 mmol/l
Creatinine 130 μmol/l 50–120 µmol/l
Corrected Ca2+ 3.1 mmol/l 2.20–2.60 mmol/l
You commence treatment with intravenous fluid and the recommended intravenous drug infusion.
In which principal way will this medication correct the biochemical abnormality?