Kenacort 0.1% Oral Paste belongs to a group of medicines called steroids. It is used for the treatment of mouth ulcers. It provides relief from swelling and redness in the affected area. Kenacort 0.1% Oral Paste should be applied on the site of lesion inside the mouth. Use it in the dose and duration as advised by your doctor. Wash your hands before and after applying the medicine. Make sure not to swallow the medication. Do not stop using it until you have finished the complete course, even when you feel better. You must avoid eating, drinking, or smoking for at least 30 minutes after using it. Do not use it for longer than your doctor has told you to and let him or her know if your condition does not improve after 2 to 4 weeks of treatment. The medicine is generally safe to use with minimal side effects. Occasionally it may cause application site irritation. It is not likely that other medicines you take by mouth or injection will affect the way this medicine works, but talk to your doctor before using it if you have recently used another cream that contains a steroid. This paint should only be used if it is clearly needed if you are pregnant. Ask your doctor if it is safe.