-sulfonamides like sulfacetamide, sulfamethoxazole, sulfisoxazole, and others

They need to know if you have any of these conditions:

-cigarette smoker
-G6PD deficiency
-heart disease
-lung or breathing disease, like asthma
-mouth sores or infection
-an unusual or allergic reaction to benzocaine, para-aminobenzoic acid (PABA), other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

This medicine is not for long-term use. Do not use for longer than directed on the label or your doctor or health care professional. Do not use on large areas of broken or damaged skin. Contact your doctor or health care professional if your condition does not start to get better within a few days or if you notice redness, itching or swelling.

The affected area of your mouth will be numb. Try to avoid injury to that area. To avoid biting the tongue or cheek, or difficulty swallowing, do not chew gum or food until the numbness wears off.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Do not freeze. Throw away any unused medicine after the expiration date.