Dental anesthetics (an-ess-THET-iks) are used in the mouth to relieve pain or irritation caused by many conditions. Examples include toothache, teething, and sores in or around the mouth, such as cold sores, canker sores, and fever blisters. Also, some of these medicines are used to relieve pain or irritation caused by dentures or other dental appliances, including braces. However, if you have an infection or a lot of large sores in your mouth, check with your medical doctor or dentist before using a dental anesthetic because other kinds of treatment may be needed. Also, the chance of side effects is increased.
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