What is the shelf life of the Leo Laboratories Limited tinzaparin sodium 20,000 IU/ml vial product before and after opening?

The Leo Laboratories Limited tinzaparin sodium 20,000 IU/ml vial product has a 2-year unopened shelf life; after opening, chemical/physical stability is demonstrated for 28 days at 30°C and microbiological storage is limited to 28 days at 30°C, with other in-use times and conditions the user's responsibility.