Kidney transplantation (KT) is the best treatment for patients with kidney failure, associated with improved survival and quality of life compared with maintenance dialysis. However, despite constant improvements in the assessment and management of the alloimmune response, KT patients frequently demonstrate a reduced estimated glomerular filtration rate. Therefore, the usual complications of chronic kidney disease (CKD), such as anemia, hypertension, metabolic acidosis, hyperkalemia, or persistent secondary hyperparathyroidism, are highly prevalent after KT. However, their underlying mechanisms are different in the transplant setting (compared with the nontransplanted CKD population), and management recommendations are based on relatively poor-quality data. In recent years, new therapies have emerged, significantly improving kidney and cardiovascular outcomes of non-KT patients with CKD. Whether those new drugs could improve the outcomes of KT patients has largely been under investigated so far. In this review, we will address the challenges of the management of a KT patient with a reduced estimated glomerular filtration rate, cover the published evidence, and highlight the critical knowledge gaps., Competing Interests: T.D. reports research support from the Fonds National de Recherche Scientifique – FNRS (F.R.S.-FNRS) as well as travel support from Organ Recovery Systems, Diegem, Belgium. E.G. reports research support from Baxter Healthcare, conference support from Baxter Healthcare, Fresenius, Nx Stage, Dirinco, and AstraZeneca; and consulting fees from Amgen, Astellas, AstraZeneca, Bayer, Baxter Healthcare, Fresenius, NxStage, and Dirinco. M.J. reports research support from AstraZeneca, speaker fees from AstraZeneca, Bayer, Boehringer-Ingelheim, and Menarini; consulting fees from Astellas, AstraZeneca, Bayer, Boehringer-Ingelheim, Cardiorenal, CSL Vifor, GlaxoSmithKline, Stada-Eurogenerics, and Vertex; and other: co-chair of Kidney Disease Improving Global Outcomes (KDIGO) since January 2019. A.D. reports consultancy fees from Alnylam and Merck. E.V.R. reports support from CSL Vifor and Pharmacosmos; speaker fees from Baxter Healthcare, Astellas, and Bayer; and consulting fees from Bayer. N.K. reports consulting fees from Hansa Biopharm. The other authors declare no conflicts of interest., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)