How much sodium does each millilitre of Palladone (hydromorphone hydrochloride) 2 mg/ml solution for injection or infusion contain?

Each millilitre of Palladone (hydromorphone hydrochloride) 2 mg/ml solution for injection or infusion contains 0.153 mmol (3.52 mg) sodium and is considered essentially sodium-free because it contains less than 1 mmol (23 mg) sodium per ml.