Answer
It can produce an antidiuretic-hormone-like effect that retains water and dilutes blood sodium. Risk is higher with some kidney, heart and medicine-related factors.
Sources for this answer
- Oxcarbazepine Mylan 300 mg Film-coated Tabletsemc · SmPC Current selected SmPC · Version 7
- Trileptal 60 mg/ml Oral Suspensionemc · SmPC Current selected SmPC · Version 28