Answer
The Roma Pharmaceuticals Limited calcium polystyrene sulfonate 99.934% w/w powder for oral/rectal suspension product has a shelf life of 48 months before opening and must be used within 30 days once opened.
Sources for this answer
- Calcium Polystyrene Sulfonate 99.934% w/w Powder for Oral/Rectal SuspensionRoma Pharmaceuticals Limited · emc · SmPC §6.3 Shelf life · Version 3Document updated
Sources checked