# Beyond expensive innovations: affordable and effective strategies for managing tubulopathies in adults

## TL;DR

This paper reviews affordable and practical strategies for managing tubulopathies in adults, emphasizing non-targeted interventions and overlooked supportive care.

## Contribution

The paper proposes a resource-conscious approach to tubulopathies, highlighting phenotype-based care and the need for studies on patient-reported outcomes.

## Key findings

- Non-targeted measures like hydration and electrolyte supplementation remain core management strategies.
- Widely available drugs can be repurposed for specific tubular phenotypes.
- Supportive care components like patient education and adherence support are often overlooked.

## Abstract

Tubulopathies comprise a heterogeneous and still poorly defined group of inherited and acquired disorders in which tubular transport is disproportionately impaired, resulting in chronic electrolyte and acid–base disturbances with downstream complications such as nephrocalcinosis, nephrolithiasis, bone fragility and, in some entities, progressive chronic kidney disease. Over the past decade, high-cost targeted therapies have transformed outcomes for a subset of tubulopathy-related disorders with secondary tubular involvement (e.g. anti–fibroblast growth factor 23 therapy in X-linked hypophosphatemia), yet comparable innovations remain largely unavailable for primary tubular transport defects and access to these therapies is uneven across healthcare systems. In this narrative review, we synthesize current evidence and expert recommendations for pragmatic, phenotype-driven interventions that support daily care and may help prevent complications. Core management still relies on non-targeted measures, including individualized nutritional counselling, optimization of hydration and solute load, and tailored electrolyte and alkali supplementation. We also discuss the rational use of widely available drugs that can be repurposed in selected tubular phenotypes, such as thiazide and thiazide-like diuretics, potassium-sparing agents, azole antifungals in calcitriol-driven hypercalcaemic states and emerging data on sodium-glucose cotransporter 2 inhibitors. Finally, we emphasize supportive care components often overlooked in ‘drug-centred’ approaches, including structured patient education, adherence support and monitoring of extra-renal manifestations. Overall, this review argues for a more resource-conscious approach to tubulopathies: one that recognizes the lack of a consensual definition, prioritizes phenotype-based care bundles, and underscores the urgent need for larger prospective studies incorporating patient-reported outcomes and robust economic endpoints, particularly the out-of-pocket burden borne by patients and families.