Answer
The 500-tablet HDPE bottle pack of the Aurobindo Pharma - Milpharm Ltd. product, montelukast 4 mg chewable tablets, has an in-use shelf life of 12 months.
Sources for this answer
- Montelukast 4 mg chewable tabletsAurobindo Pharma - Milpharm Ltd. · emc · SmPC §6.3 Shelf life · Version 11Document updated
Sources checked