Toxicology of acyclovir

Area of Science:

• Pharmacology
• Toxicology
• Virology

Background:

• Acyclovir interferes with nucleic acid metabolism, necessitating careful evaluation of its toxicological profile.
• Substances affecting nucleic acid metabolism require scrutiny for carcinogenic and mutagenic properties.

Purpose of the Study:

• To review available toxicological data for acyclovir.
• To assess the potential risks of acyclovir, including mutagenicity, teratogenicity, and carcinogenicity.

Main Methods:

• Review of existing toxicological investigations on acyclovir.
• Analysis of genotoxic effects in mammalian cell systems at various doses.

Main Results:

• Acyclovir exhibits genotoxic effects in mammalian cells only at very high doses, comparable to naturally occurring nucleosides, suggesting no significant hazard.
• Recommended clinical doses of acyclovir are not associated with mutagenic, teratogenic, or carcinogenic risks.
• Potential risks include fetal toxicity with infusion treatment and kidney damage due to drug accumulation, which is less significant with oral administration and minimal with ophthalmic use.

Conclusions:

• Acyclovir demonstrates a low overall toxic potential.
• Clinical use of acyclovir at recommended doses is generally safe regarding mutagenicity, teratogenicity, and carcinogenicity.
• Caution is advised regarding fetal exposure during infusion and potential kidney effects, with route of administration influencing risk.