Answer
Each vial of the Pfizer Limited topotecan hydrochloride 4 mg/4 ml concentrate for solution for infusion product contains less than 1 mmol sodium (23 mg), essentially 'sodium-free', but dilution with 0.9% sodium chloride increases the sodium dose.
Sources for this answer
- Topotecan Hospira 4 mg/4 ml concentrate for solution for infusionPfizer Limited · emc · SmPC §4.4 Special warnings and precautions for use · Version 18Document updated
Sources checked