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Care365 medication guide
Acyclovir (Topical)
The Canadian Zovirax reference covers selected genital/cutaneous herpes infections. It does not establish a general cold-sore regimen.
Drug information
Uses, directions and safety information for Acyclovir (Topical).
What it is used for
The Canadian Zovirax reference covers selected genital/cutaneous herpes infections. It does not establish a general cold-sore regimen.
How to use it
Use only for the assessed indication and exact formulation; it does not prevent transmission or eradicate latent virus.
Before use
Avoid acyclovir/valacyclovir allergy; keep away from eyes and mucous membranes.
Possible side effects
Application-site burning or discomfort.
When to get medical help
Eye involvement, spreading infection or severe irritation needs assessment.
Medicines and interactions
Review other products used on the affected area.
Pregnancy and breastfeeding
Pregnancy, breastfeeding and use under 18 require individual medical review.
Missed doses, storage and accidental exposure
Follow your own product’s missed-dose instructions. If you are unsure, ask a pharmacist before taking an extra dose. Contraceptives, injections and modified-release medicines may need a specific plan.
Keep the original packaging and follow its storage, expiry and disposal instructions. Keep medicines away from children and pets. Ask about refrigeration, after-opening limits and safe sharps disposal when relevant.
For suspected overdose or accidental swallowing, contact poison control or urgent medical care promptly. Call emergency services for breathing difficulty, collapse or a seizure.
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Related condition guides
Learn about concerns where this medication may be discussed. Treatment depends on your individual assessment.
Prescription renewal and medication review
For a review of Acyclovir (Topical), have your current dose, reason for treatment, remaining supply, benefits, side effects and pharmacy details ready. Ask your pharmacist or prescriber whether a renewal assessment is available and appropriate. A prescription or renewal is not guaranteed.
Questions about Acyclovir (Topical)
What is Acyclovir (Topical) used for?
The Canadian Zovirax reference covers selected genital/cutaneous herpes infections. It does not establish a general cold-sore regimen.
How should I use Acyclovir (Topical)?
Use only for the assessed indication and exact formulation; it does not prevent transmission or eradicate latent virus.
What side effects can Acyclovir (Topical) cause?
Application-site burning or discomfort.
When should I get medical help while using Acyclovir (Topical)?
Eye involvement, spreading infection or severe irritation needs assessment.
Can Acyclovir (Topical) interact with other medicines?
Review other products used on the affected area.
What should I know about Acyclovir (Topical) during pregnancy or breastfeeding?
Pregnancy, breastfeeding and use under 18 require individual medical review.
Sources and product information
Sources checked 2026-09-08. Safety sections are highlights; consult the full product information for complete warnings and instructions.
Check the Canadian Drug Product Database by product name or DIN for current product information.
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