Complex Medication Interaction Detection Query

Create an advanced SQL query that cross-references patient prescription records to detect potential dangerous medication interactions. The solution must: 1) Use recursive Common Table Expressions (CTEs) to map complex drug interaction networks, 2) Implement a severity scoring mechanism for potential conflicts, 3) Generate real-time alerts for healthcare providers, 4) Handle multiple drug combinations with O(log n) computational complexity. Include comprehensive error handling and support for ICD-10 and RxNorm coding standards.