Herpes Zoster
There are no data on treatment initiated more than 72 hours after onset of the zoster rash. Patients should be advised to initiate treatment as soon as possible after a diagnosis of herpes zoster.
Patient-Friendly FDA Guidance
Acyclovir
Brand names: Avaclyr, Sitavig, Xerese, Zovirax
Drug class: Herpesvirus Nucleoside Analog Dna Polymerase Inhibitor
Dosage form: Tablet
Last updated · May 27, 2026Source: DailyMed ↗
Poison Help
If you suspect an overdose or accidental ingestion, call Poison Control: 1-800-222-1222 (free, 24/7, U.S.). For life-threatening symptoms, call 911.
Sources
RxCUI: 197311
NDC: 60687-856
Last fetched: May 27, 2026
Source: DailyMed ↗
⚠️ Disclaimer
This information is for educational purposes only and is not medical advice. Always consult your doctor, pharmacist, or other licensed healthcare professional before starting, stopping, or changing any medicine. Read full medical disclaimer.