Valacyclovir is an oral antiviral agent being used more frequently than acyclovir because of the ease of administration and efficacy. Serious neuropsychiatric side effects have been demonstrated with the use of valacyclovir in renal failure patients. We report a case of valacyclovir neurotoxicity to emphasis the importance of dose adjustment in patients with chronic kidney disease and on dialysis.
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http://dx.doi.org/10.1097/MJT.0b013e318289bae9 | DOI Listing |
J Pharm Pract
February 2024
Clinical Pharmacy, Providence Veteran Affairs Medical Center, Providence, RI, USA.
The objective of this case series is to highlight different manifestations of valacyclovir associated neurotoxicity (VAN) and demonstrate the importance of adjusting medication appropriately in patients with end-stage renal disease (ESRD) on hemodialysis to prevent these complications. Valacyclovir is a medication used to treat herpes zoster infection, commonly known as shingles. Valacyclovir is renally cleared and can accumulate in patients with renal dysfunction leading to severe side effects due to the prolonged half-life.
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September 2023
Internal Medicine, Medical College of Wisconsin, Milwaukee, USA.
Neurotoxicity can develop as a side effect of valacyclovir in patients with renal disease, especially without a renally adjusted dose. We present a 56-year-old female with end-stage renal disease (ESRD) on hemodialysis (HD) who presented to the emergency room (ER) with agitation and confusion and was found to have valacyclovir-associated neurotoxicity (VAN). Five days prior, she had been prescribed the standard treatment of 500 mg valacyclovir twice daily for three days for herpes simplex virus-1 (HSV-1); however, her creatinine clearance was low enough to require a renally adjusted dose.
View Article and Find Full Text PDFFront Med (Lausanne)
September 2022
TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan.
Whether valacyclovir-associated neurotoxicity (VAN) occurs more frequently in patients with end-stage renal disease (ESRD) on dialysis is unknown. This is the first population-based study to examine the risk of VAN associated with ESRD patients on dialysis. Among 2,284,800 patients diagnosed as having herpes zoster from 2002 to 2016, patients with ESRD on dialysis and individuals with normal renal function were enrolled in this study.
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February 2021
Internal Medicine/Nephrology, Virginia Commonwealth University, Richmond, USA.
There are a few cases of valacyclovir-associated neurotoxicity (VAN) reported. This case report documents a case of a 55-year-old male presenting with emotional lability or pseudobulbar affect as the predominant or sole manifestation of VAN. A failure to adjust valacyclovir's dose for herpes simplex infection in the setting of dialysis-dependent end-stage renal disease (ESRD) preceded VAN in this patient.
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