Proper Use

Información sobre medicamentos proporcionada por: IBM Micromedex

Use this medicine exactly as directed by your doctor to benefit your condition as much as possible. Do not use more of it, do not use it more often, and do not use it for a longer time than your doctor ordered.

This medicine should come with a patient information leaflet. Read and follow these instructions carefully. Ask your doctor or pharmacist if you have any questions.

This medicine is only for cold sores on the lips and around the mouth.

To use:

  • Peel the blister back to remove the tablet. Do not push the tablet through the blister as this may damage the tablet.
  • Use this medicine within 1 hour after you have the first symptom of a cold sore, such as itching, redness, burning, or tingling, and before a cold sore begins.
  • Place the tablet in the mouth, on the upper gum above the incisor tooth, with a clean, dry finger. Press on the upper lip lightly for 30 seconds to ensure adhesion.
  • For comfort, place the rounded side of the tablet facing the upper gum
  • The tablet will dissolve slowly during the day. Do not crush, chew, suck, or swallow the tablet.
  • Apply the tablet on the same side of the mouth with the cold sores symptoms.
  • You may eat and drink while the tablet is in placed on your upper gums.
  • Drink more liquids if your mouth becomes dry while using this medicine.
  • Avoid chewing gums, touching or pressing the tablet after it is placed, wearing upper dentures, or brushing your teeth while using this medicine.
  • Do not remove the tablet if it sticks to your upper gum. If the tablet does not stick or falls off of your upper gum within the first 6 hours that you have applied, use the same tablet and place it back onto your upper gum. If it still does not stick, replace it with a new tablet.
  • If you swallow the tablet within the first 6 hours of applying it, drink a glass of water and place a new tablet on your upper gum.
  • Do not reapply a new tablet if it falls out or if you swallow it after it has been placed 6 hours or longer.


The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For buccal dosage form (tablets):
    • For cold sores:
      • Adults—50 milligrams (mg) as a single dose.
      • Children—Use and dose must be determined by your doctor. Use in younger children is not recommended due to the potential risk of choking.


Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.