Your doctor or dentist will tell you how much medicine to use and how often.
Use the medicine on the sores in your mouth.
Wash your hands with soap and water before and after using this medicine.
Start using the medicine at the first sign of a canker sore. After that, your doctor may tell you to use the medicine 4 times each day, after breakfast, lunch, dinner, and at bedtime.
It is best to brush your teeth or rinse your mouth before using the medicine.
Squeeze about 1/4 inch of paste onto your finger. Gently dab or press the paste on the sore. Cover each sore in your mouth with the medicine.
Use the paste until your canker sores heals.
Do not get the medicine in your eyes. If this does happen, rinse your eyes with large amounts of cool water. If you have eye pain or redness that does not go away, tell your doctor.
If a dose is missed:
Apply the medicine as soon as possible, unless it is almost time for your next dose.
Skip the missed dose if it is almost time for your next regular dose.