Carboplatin

Acute Tubular Necrosis — representative incidence ~5%.

Clinically significant nephrotoxicity uncommon at standard doses; emerges mainly at high/myeloablative doses.

Source: Gupta et al., Adv Chronic Kidney Dis 2021

Reported injury signatures: Acute Tubular Necrosis, Electrolyte Disturbance, Hemorrhagic Cystitis, SIADH / Hyponatremia.

1. Acute Tubular NecrosisPrimary
2. Electrolyte DisturbanceSecondary~72%Hypomagnesemia in 104/144 (72%) ovarian-cancer patients on carboplatin-based chemo (grade 2 in 11%, grade 3/4 in 11%); associated with treatment duration
3. Hemorrhagic CystitisRareCase-level hemorrhagic urothelial injury with single-agent carboplatin; most FAERS naming volume rides ifosfamide/cyclophosphamide co-regimens.
4. SIADH / HyponatremiaRareCase-level reports, including recurrence after a switch from cisplatin.

Acute (~1–7 days) — Acute rise when it occurs, essentially confined to high-dose regimens.

• High / myeloablative dosing
• Pre-existing CKD
• Prior cisplatin

• GFR-based (Calvert) dosing

• Estimate GFR (measured or validated equation) before every cycle and recompute the Calvert dose; do not carry forward an old GFR.
• Check serum creatinine, magnesium, potassium, and phosphate at baseline and before each cycle; repeat electrolytes if cytopenias prompt dose delays.
• Replete magnesium proactively and recheck after repletion, since hypomagnesemia is the most common renal-tubular abnormality.
• Track the CBC closely (especially platelets) because myelosuppression is dose-limiting and worsens with reduced renal clearance.
• Watch for spuriously low creatinine (low muscle mass, cachexia) that inflates estimated GFR and risks overdosing.

• Calvert formula (Calvert et al., J Clin Oncol 1989) — derived carboplatin dosing from target AUC and GFR, the basis for renal-function-adjusted dosing still used today.
• ICON3 (Lancet 2002) — established single-agent carboplatin as having efficacy comparable to platinum combinations in ovarian cancer with a more favorable non-hematologic (including renal) toxicity profile than cisplatin.
• GOG-158 (Ozols et al., J Clin Oncol 2003) — carboplatin/paclitaxel was non-inferior to cisplatin/paclitaxel in ovarian cancer with significantly less nephrotoxicity and electrolyte disturbance.

• Carboplatin is substantially less nephrotoxic than cisplatin — its slower-aquating, more stable leaving group means clinically significant AKI is uncommon at standard AUC-based doses.
• Because dose is set by the Calvert formula, accurate GFR is the single most important renal safety step; a falsely high GFR estimate causes overdose, and a falsely low one causes underdosing.
• It does not require the aggressive saline pre/post-hydration and forced diuresis mandated for cisplatin, simplifying outpatient delivery.
• Renal toxicity, when it occurs, is more likely at high cumulative or high-dose (e.g., transplant-conditioning) regimens than at conventional AUC 5-6 dosing.
• Hypomagnesemia and other tubular electrolyte losses are the most frequent renal finding and are usually milder and more reversible than with cisplatin.
• Hemorrhagic urothelial injury (gross hematuria, bladder clots) is reported with single-agent carboplatin — rare, and most FAERS hemorrhagic-cystitis volume still rides on ifosfamide/cyclophosphamide co-regimens.
• SIADH is attributed to carboplatin in case reports (including recurrence after a switch from cisplatin); much of the reporting comes from the SCLC carboplatin-etoposide population.

Each recommendation below is this atlas's faithful summary of the source, not a quotation from it — follow the PubMed link for the wording the society published. Summaries may be superseded; consult the current full text and individualize to the patient.

• ADQI (2026) — Conventional cytotoxic chemotherapy-associated nephrotoxicity: consensus report of the 34th Acute Disease Quality Initiative (ADQI) WorkgroupCisplatin is identified as a leading cytotoxic nephrotoxin; the workgroup details preventive measures (adequate isotonic hydration, correction of volume depletion, avoidance of concurrent nephrotoxins, attention to electrolyte/magnesium wasting) and management of cisplatin-associated AKI, with a research agenda for knowledge gaps.Kidney Int · PMID 41881107
• Expert Consensus (2022) — The Prevention of Cisplatin-Induced Nephrotoxicity: A General Consensus Statement of a Group of Oncologist-Hematologists, Adult and Pediatric Nephrologists, Radiation Oncologists, Clinical Pathologists, Clinical Pharmacologists, and Renal Physiologists on Cisplatin Therapy in Cancer PatientsConsensus on modifiable factors for cisplatin nephrotoxicity prevention, addressing hydration methods, magnesium supplementation, dextrose, avoidance of NSAIDs and renin-angiotensin system inhibitors and contrast agents around cisplatin, GFR assessment, antioxidants, and patient factors (age, sex, female hormones).Int J Prev Med · PMID 35392316
• ADQI (2026) — The nephrotoxic effects of anti-cancer therapies: consensus report of the 34th Acute Disease Quality Initiative workgroupProvides expert-based statements (modified Delphi) on preventing and managing cisplatin/platinum-associated AKI, including isotonic IV hydration, attention to volume status and concomitant nephrotoxins, and incorporates evidence that IV magnesium supplementation may reduce cisplatin-associated AKI; emphasizes risk stratification and standardized AKI definitions.Nat Rev Nephrol · PMID 41361704
• SIRM (2022) — SIRM-SIN-AIOM: appropriateness criteria for evaluation and prevention of renal damage in the patient undergoing contrast medium examinations-consensus statements from Italian College of Radiology (SIRM), Italian College of Nephrology (SIN) and Italian Association of Medical Oncology (AIOM)Recommends eGFR-based renal risk assessment and pre/post-contrast isotonic saline or sodium bicarbonate hydration; advises maintaining a 5-7 day interval between iodinated contrast administration and cisplatin in cancer patients to reduce additive nephrotoxicity.Radiol Med · PMID 35303246
• KDIGO (2020) — KDIGO Controversies Conference on onco-nephrology: understanding kidney impairment and solid-organ malignancies, and managing kidney cancerIdentifies platinum compounds (especially cisplatin) as leading cytotoxic causes of acute tubular injury, AKI, and electrolyte/magnesium wasting; calls for interdisciplinary onco-nephrology care, accurate GFR estimation, and individualized drug dosing in patients with reduced kidney function.Kidney Int · PMID 33126977
• KDIGO (2020) — KDIGO Controversies Conference on onco-nephrology: kidney disease in hematological malignancies and the burden of cancer after kidney transplantationAddresses chemotherapy-associated AKI/CKD in hematologic cancer, GFR estimation and chemotherapy dosing in patients with reduced kidney function, and management priorities and research gaps for onco-nephrology care.Kidney Int · PMID 33276867
• ADDIKD (2025) — Integrating International Consensus Guidelines for Anticancer Drug Dosing in Kidney Dysfunction (ADDIKD) into everyday practiceProvides GRADE-based, drug-specific dose-adjustment recommendations for anticancer agents in kidney dysfunction (illustrated for methotrexate, cisplatin, carboplatin and nivolumab); the recommendations build on Part 1's standardised CKD-EPI eGFR assessment rather than Cockcroft-Gault creatinine clearance.EClinicalMedicine · PMID 40290844
• ADDIKD (2025) — Aligning kidney function assessment in patients with cancer to global practices in internal medicineThree consensus recommendations: assess kidney function by GFR (measured GFR or CKD-EPI eGFR), classify it using KDIGO categories, and use this uniform approach to dose anticancer drugs — moving cancer medicine away from Cockcroft-Gault estimated creatinine clearance.EClinicalMedicine · PMID 40290845
• ADDIKD (2025) — A methodology for determining dosing recommendations for anticancer drugs in patients with reduced kidney functionEstablishes that, where RCT evidence is lacking, anticancer drug dosing recommendations in kidney dysfunction should be derived by critically appraising observational literature via GRADE combined with structured international multidisciplinary consensus voting.EClinicalMedicine · PMID 40290846
• KDIGO (2013) — Diagnosis, evaluation, and management of acute kidney injury: a KDIGO summary (Part 1)Defines/stages AKI by serum creatinine and urine output; emphasizes avoiding nephrotoxins, maintaining euvolemia/perfusion, dose-adjusting drugs to kidney function, and monitoring high-risk patients — the framework applied to nephrotoxic anti-cancer agents.Crit Care · PMID 23394211
• KDIGO (2024) — Executive summary of the KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease: known knowns and known unknownsEvaluate and risk-stratify CKD, manage to delay progression and its complications, and practise explicit medication management and drug stewardship — the framework the atlas's G1–G5 eGFR banding and every renal dose-adjustment recommendation sit inside. Because the guideline excludes dialysis and transplant recipients by its own statement of scope, its recommendations do not carry to those settings, where this atlas's dialyzability and post-transplant guidance rests on other sources.Kidney Int · PMID 38519239
• KDIGO (2021) — Executive summary of the KDIGO 2021 Guideline for the Management of Glomerular DiseasesProvides the staging/treatment framework for drug-associated glomerular lesions (e.g., bisphosphonate- and interferon-related collapsing FSGS, VEGF-inhibitor podocytopathy/proteinuria), including immunosuppression and supportive RAAS-blockade strategies.Kidney Int · PMID 34556300
• KDIGO (2024) — Executive summary of the KDIGO 2024 Clinical Practice Guideline for the Management of ANCA-Associated VasculitisUpdates immunosuppressive induction (rituximab/cyclophosphamide), incorporates avacopan and lower-dose or glucocorticoid-sparing regimens — the management framework for drug- and checkpoint-inhibitor-associated ANCA/pauci-immune glomerulonephritis.Kidney Int · PMID 38388147
• KDIGO (2024) — Executive summary of the KDIGO 2024 Clinical Practice Guideline for the Management of Lupus NephritisUpdates first-line lupus nephritis therapy to combination immunosuppression with the addition of belimumab or a calcineurin inhibitor (voclosporin) — informs management of immune-complex/lupus-like glomerulonephritis encountered with immunotherapy.Kidney Int · PMID 38182299
• KDIGO (2025) — Executive summary of the KDIGO 2025 Clinical Practice Guideline for the Management of Immunoglobulin A Nephropathy (IgAN) and Immunoglobulin A Vasculitis (IgAV)Encourages liberal kidney biopsy and stricter proteinuria control (<0.5 g/d, ideally <0.3 g/d) with RAAS blockers, SGLT2 inhibitors, and targeted-release budesonide — the framework for IgA-dominant glomerular lesions, including those triggered by immune-modulating cancer therapy.Kidney Int · PMID 40975525