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Summary
Vidarabine (Ara A) offers topical antiviral benefits comparable to IDU, serving as an alternative for allergic or resistant patients. Intravenous Ara A effectively treats herpetic iritis and stromal disease with minimal toxicity.
Area of Science:
- Ophthalmology
- Virology
- Pharmacology
Background:
- Ara A (Vidarabine) is a topical antiviral with efficacy similar to IDU.
- Patients may be allergic or resistant to one antiviral, necessitating alternatives.
- Topical agents are generally ineffective for deep stromal herpetic eye disease.
Purpose of the Study:
- To evaluate the efficacy and safety of intravenous Ara A for herpetic iritis and deep stromal disease.
- To compare the topical antiviral activity of Ara A with IDU.
- To identify alternative antiviral treatments for ocular herpes.
Main Methods:
- Double-blind studies were conducted to assess the efficacy of intravenous Ara A.
- Topical antiviral activity of Ara A was compared to IDU.
- Patient responses to Ara A and IDU were monitored, including cases of allergy or resistance.
Main Results:
- Intravenous Ara A demonstrated effectiveness against herpetic iritis and deep stromal disease.
- No topical agent has previously shown efficacy in treating these conditions in humans.
- Ara A's topical antiviral potency is identical to IDU.
- Intravenous administration of Ara A was not associated with significant toxicity.
Conclusions:
- Intravenous Ara A is a safe and effective treatment for herpetic iritis and deep stromal disease.
- Ara A serves as a valuable alternative to IDU for topical antiviral therapy.
- The findings support the use of Ara A for specific ocular herpes infections where topical treatments fail.