ZOSTER CREAM (5% 5g Acyclovir)

ZOSTER CREAM (5% 5g Acyclovir)

Topical Antiviral

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Product Information

ZOSTER 5% Cream (Acyclovir) is a topical antiviral used to treat:

  • Cold sores (fever blisters) on the face or lips caused by the herpes simplex virus.
  • First outbreaks of genital herpes. 
  • Certain herpes simplex virus sores in people with weakened immune systems.

It works by slowing the growth and spread of the herpes virus, helping sores heal faster. It does not cure herpes, prevent future outbreaks, or stop transmission to others.

Why is this Medication Prescribed?

Doctors prescribe ZOSTER CREAM (Acyclovir) for the treatment of cold sores and herpes-related skin outbreaks, particularly in immunocompromised patients.

Uses

  • Treatment of cold sores (herpes labialis).
  • First outbreak of genital herpes.
  • Certain herpes simplex sores in people with weak immune systems.

Benefits

  • Helps heal cold sores more quickly.
  • Reduces pain, redness, and irritation caused by herpes sores.
  • Works best if applied at the first signs of a cold sore (tingling, itching, redness).

How Should this Medicine be Used?

  • Apply to affected skin 5 times daily for 4 days, or as directed by your doctor.
  • Works best if started early, before blisters appear.

Step-by-step instructions:

  • Wash your hands.
  • Clean and dry the affected skin area.
  • Apply a thin layer of cream to cover the sore or early affected area.
  • Rub gently until absorbed.
  • Leave the area uncovered (unless instructed otherwise).
  • Wash your hands again after applying.
  • Avoid bathing, showering, or swimming immediately after application.
  • Do not rub or irritate the affected area.

Missed dose:

  • Apply as soon as remembered.
  • If close to the next dose, skip the missed one.
  • Do not double the dose.

Other Uses

Sometimes prescribed for off-label topical antiviral treatment in certain herpes-related skin conditions.

☀️ Photosensitivity Risk Warning

This medicine may make your skin more sensitive to sunlight.

  • Avoid prolonged sun exposure, tanning beds, and sunlamps.
  • Use sunscreen and protective clothing when outdoors.
  • Seek medical advice if you develop severe sunburn or a rash in treated areas.

Special Precautions

  • Do not use if allergic to acyclovir, valacyclovir, or any cream ingredients.
  • Inform your doctor about all other medications, supplements, or herbal products.
  • Tell your doctor if you have immune system conditions (HIV, AIDS).
  • Consult your doctor if pregnant, planning pregnancy, or breastfeeding.

Possible Side Effects

Mild side effects (usually temporary):

  • Dry or cracked lips
  • Flaky or peeling skin
  • Burning or stinging at application site
  • Redness, swelling, or mild irritation

Serious side effects (seek immediate medical help):

  • Rash, hives, severe itching
  • Difficulty breathing or swallowing
  • Swelling of face, throat, lips, eyes, hands, or feet
  • Hoarseness

Storage & Disposal

  • Store at room temperature, tightly closed, away from heat and moisture.
  • Keep out of reach of children.
  • Do not leave in hot or cold vehicles.
  • Dispose through a medicine take-back program. Do not flush down the toilet.

Emergency Guidance

  • If swallowed, call your local poison control center.
  • If the person collapses or is not breathing, call emergency services immediately.
  • Seek urgent care for signs of a severe allergic reaction.

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