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Memantine - Namenda ™ - Renal Dosing

Usual Dosing (Adults)

Initially, 5 mg/day. Increase dose by 5 mg/day to a target dose of 20 mg/day. Wait at least 1 week between dosage changes. Doses >5 mg/day should be given in 2 divided doses.

Renal Dosing

dialysis Renal Impairment:
Memantine pharmacokinetics were evaluated following single oral administration of 20 mg memantine HCl in 8 subjects with mild renal impairment (creatinine clearance, CLcr, >50 – 80 mL/min), 8 subjects with moderate renal impairment (CLcr 30 – 49 mL/min), 7 subjects with severe renal impairment (CLcr 5 – 29 mL/min) and 8 healthy subjects (CLcr > 80 mL/min) matched as closely as possible by age, weight and gender to the subjects with renal impairment. Mean AUC0-infinity increased by 4%, 60%, and 115% in subjects with mild, moderate, and severe renal impairment, respectively, compared to healthy subjects. The terminal elimination half-life increased by 18%, 41%, and 95% in subjects with mild, moderate, and severe renal impairment, respectively, compared to healthy subjects.

[Mild to Moderate impairment]: No dosage adjustment is recommended for patients with mild and moderate renal impairment. 

[Severe impairment]: A target dose of 5 mg BID is recommended in patients with severe renal impairment (creatinine clearance of 5 – 29 mL/min based on the Cockroft-Gault equation):

For males: CLcr = [140-age (years)]· Weight (kg)/[72 · serum creatinine (mg/dL)]

For females: CLcr = 0.85 · [140-age (years)]· Weight (kg)/[72 · serum creatinine (mg/dL)]

Hemodialysis

dialysis Use is not recommended.

Reference(s)

National Institutes of Health, U.S. National Library of Medicine, DailyMed Database.
Provides access to the latest drug monographs submitted to the Food and Drug Administration (FDA). Please review the latest applicable package insert for additional information and possible updates.  A local search option of this data can be found here.

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The authors make no claims of the accuracy of the information contained herein; and these suggested doses are not a substitute for clinical judgment. Neither GlobalRPh Inc. nor any other party involved in the preparation of this program shall be liable for any special, consequential, or exemplary damages resulting in whole or part from any user's use of or reliance upon this material.PLEASE READ THE DISCLAIMER CAREFULLY BEFORE ACCESSING OR USING THIS SITE. BY ACCESSING OR USING THIS SITE, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS SET FORTH IN THE DISCLAIMER.   Read the disclaimer
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