Does the product information for Sodium Citrate 0.3M Oral Solution list any additional side effects beyond those covered under contraindications, warnings, interactions and overdose?

No, the product information for Sodium Citrate 0.3M Oral Solution states that there are no further effects beyond those mentioned in sections 4.3, 4.4, 4.5 and 4.9 of the Summary of Product Characteristics.