Finerenone Treatment for Diabetic Cardiovascular Autonomic Neuropathy: the FibroCAN Study

To be included in this study the participants must fulfill the following inclusion criteria. * Given informed consent * Type 2 diabetes defined by WHO criteria * Aged 40 ≥ at inclusion * Pathological E/I ratio (Mean value of three measures) Exclusion criteria Participants will be excluded in one or more of the following criteria are met. * No CAN (no abnormal CARTs) * Definite CAN (more than one abnormal CART) * HbA1C \>100 mmol/L * Treatment with potassium-sparing diuretics (amiloride) or MRAs e.g., spironolactone or eplerenone which cannot be discontinued 4 weeks prior to screening visit. The patient's primary physician, who is not involved in this study, will determine if discontinuation is possible. * Atrial fibrillation/flutter * Congestive heart failure (NYHA class 3-4) * History of cardiac arrhythmia * Severe forms of respiratory disease including asthma and COPD * Any nondiabetic cause of neuropathy * All female subjects of childbearing potential (WOCBP) must have a negative result of a highly sensitive urine HCG (pregnancy test) performed at screening. Subjects of childbearing potential must agree to use a highly effective form of contraception throughout the duration of the study (list of definition on WOCBP and accepted contraception in appendix A). * Severe hepatic impairment * Lactose intolerance * Breastfeeding * Nephropathy requiring dialysis * Beta-blocker-use * Hyperkalemia at screening visit (plasma potassium \>4.8 mmol/l) * eGFR \< 25 ml/min/1.73m2 * Potassium plasma \> 4.8 mmol/l (at randomization) * Treatment with strong CYP3A4-inhibitors (e.g. Itraconazol, ketoconazol, ritonavir, cobicistat, clarithromycin) which cannot be discontinued 4 weeks prior to screening visit * Treament with moderate to strong CYP3A4-induceres (e.g. rifampicin, carbamazepine, phenytoin, phenobarbital, St John's Wort or efavirenz) which cannot be discontinued 4 weeks prior to screening visit * Have received chemotherapeutic treatment within last 12 months * Grapefruit consumption that cannot be discontinued during the study period * Inability to complete study protocol, assessed to investigator * Not able to read, write and/or understand Danish