Carvedilol Is NOT Removed by Hemodialysis
No, carvedilol is not removed by dialysis. Carvedilol is classified as "not dialyzable" by hemodialysis due to its high protein binding (>98%) and large volume of distribution, resulting in essentially 0% removal during a standard dialysis session.
Evidence-Based Classification
The 2021 EXTRIP (Extracorporeal Treatments in Poisoning) systematic review definitively categorizes carvedilol as "Not dialyzable" alongside betaxolol, labetalol, mepindolol, propranolol, and timolol 1. This classification is based on:
- Approximately 0% removal during a 6-hour hemodialysis session when measured from dialysate collection 1
- Hemodialysis clearance of only 12.1-38.6 mL/min, which is negligible compared to the drug's endogenous clearance of 600 mL/min 1
Pharmacokinetic Properties Preventing Dialysis Removal
The FDA label explicitly states: "Consistent with its high degree of plasma protein-binding, Carvedilol does not appear to be cleared significantly by hemodialysis" 2. This is due to:
- >98% protein binding to plasma albumin 2
- Large volume of distribution of approximately 115 L, indicating extensive tissue distribution 2
- Primarily hepatic metabolism via CYP2D6 and CYP2C9, with biliary excretion 2
- High lipophilicity preventing passage through dialysis membranes 3
Clinical Studies in Dialysis Patients
Multiple pharmacokinetic studies in hemodialysis patients confirm no drug removal:
- No carvedilol passed through the dialysis membrane in a study of 6 hemodialysis patients 4
- No accumulation occurred during 4-week administration periods in dialysis patients 4, 5
- Pharmacokinetic parameters were identical on dialysis versus non-dialysis days 5
- No dosage adjustment required in hemodialysis patients 3, 5
Clinical Implications
Dosing Strategy
- Administer carvedilol on the same schedule regardless of dialysis timing 3
- Standard dosing applies (typically 12.5-25 mg daily) without adjustment for dialysis 3, 5
- No supplemental post-dialysis dose needed
Important Caveat
While carvedilol is not removed by dialysis, plasma concentrations are 40-50% higher in patients with renal impairment compared to those with normal renal function 2. This is due to altered metabolism, not dialysis removal. Additionally, carvedilol may impair vascular refilling during dialysis sessions, potentially increasing intradialytic hypotension risk (risk ratio 2.40) 6.
Practical Consideration
Some clinicians administer carvedilol only on non-dialysis days to avoid intradialytic hypotension 3, but this is a hemodynamic consideration, not related to drug removal by dialysis.