The neurological safety of intrathecal acyclovir in rats

Heezoo Kim, Yoon La Choi, Dong Kyu Lee, Sang Sik Choi, Il Ok Lee, Myounghoon Kong, Nan Sook Kim, Sang Ho Lim, Mi Kyoung Lee

Research output: Contribution to journalEditorial

2 Citations (Scopus)

Abstract

Background: Effective early antiviral treatments reduce both acute zoster pain and the risk of postherpetic neuralgia. The authors hypothesized that the direct neuraxial administration of acyclovir could provide superior drug application to the spinal neural structures with a higher viral burden and have various advantages over the other routes of drug administration in terms of required doses, side effects, and efficacy. Objective To know whether intrathecal acyclovir injection is neurologically and histopathologically safe or not. Study Design: Randomized, experimental trial in rats. Setting: Associated experiment center. Methods: A total of 40 rats weighing between 250-300g were used. The rats were randomly divided into 2 groups of 20 each using a random number table: normal saline group (Group N) and acyclovir group (Group A). Rats in Group N were administered 20 μl of normal saline and Group A were administered the same volume of 700 μg/mL acyclovir into the intrathecal space via an intrathecal catheter. Saline or acyclovir was administered daily for 5 consecutive days. The changes in behavior and sensory-motor function were checked and histopathological findings of the spinal cords were observed by light and electron microscopy. Results: No rats in Group N or Group A showed any behavioral change or sensorymotor dysfunction during the 5-day observation period. Furthermore, no histopathological abnormalities of the spinal cord were observed in the 6th day after the last intrathecal administration of the drug. Limitations: There is a need to perform studies to evaluate long-term safety by observing cumulative neurotoxic effects with continual injection during a long-term period. Conclusions: There was no evidence of neurological and histopathological abnormalities following intrathecal acyclovir injection.

Original languageEnglish
JournalPain Physician
Volume15
Issue number1
Publication statusPublished - 2012 Jan 1

Fingerprint

Acyclovir
Safety
Spinal Injections
Spinal Cord
Drug Administration Routes
Postherpetic Neuralgia
Herpes Zoster
Acute Pain
Viral Load
Pharmaceutical Preparations
Antiviral Agents
Electron Microscopy
Research Design
Catheters
Observation
Light
Injections

Keywords

  • Acute zoster pain
  • Acyclovir
  • Intrathecal
  • Post herpetic neuralgia
  • Safety
  • Spinal

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine

Cite this

The neurological safety of intrathecal acyclovir in rats. / Kim, Heezoo; Choi, Yoon La; Lee, Dong Kyu; Choi, Sang Sik; Lee, Il Ok; Kong, Myounghoon; Kim, Nan Sook; Lim, Sang Ho; Lee, Mi Kyoung.

In: Pain Physician, Vol. 15, No. 1, 01.01.2012.

Research output: Contribution to journalEditorial

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