Which of the Commonly Available and Approved Drugs in Addition to Standard of Care Can Significantly Improve the Slope of Estimated Glomerular Filtration Rate at Two Years When Compared to Standard of Care Alone in South-Asian Kidney Biopsy-proven Adult (≥18 Years) Primary IgA Nephropathy?

Oral prednisolone 0.5 mg/kg per day (maximum, 40 mg/day) for two months, followed by dose tapering by 5mg per day each month for six to nine months. All participants in this arm will receive SoC and oral cotrimoxazole prophylaxis.

Gut-directed Budesonide 12 mg once daily for nine months and tapered to 9mg once daily for the next three months, 6mg once daily for the next three months and 3mg once daily for the next three months and stopped (total 18 months). All participants in this arm will receive SoC.

Mycophenolate mofetil (MMF) 1.5g/ day for twelve months, followed by 1g/ day for six months (total 18 months). All participants in this arm will receive SoC.

Hydroxychloroquine (HCQ) 6.5 mg/kg/day (maximum 400 mg daily) for 24 months. All participants in this arm will receive SoC.

Generic drug not available currently. All participants in this arm will receive SoC.

Maximal labelled or tolerated dose of ACEi/ ARB and a steady dose of SGLT2i (10mg/d of dapagliflozin).