What should I watch for?
Be careful to avoid injury while the area is numb and you are not aware of pain. If this medicine is used in the mouth or throat, do not chew gum or eat food for at least one hour. If the area is still numb, you may choke or bite your tongue or cheek if you try to chew or swallow. Also, you may not feel pain from hot foods or drinks.
Do not apply this medicine to areas of skin that are infected, open, or damaged. This may increase the amount of medicine that passes through your skin and increase the risk of serious side effects.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Blistering, crusting, irritation, itching, or reddening of the skin
cracked, dry, or scaly skin
joint pain, stiffness, or swelling
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
swelling of the eyelids, face, lips, hands, or feet
tightness in the chest
troubled breathing or swallowing
Incidence not known
Blistering, bruising, burning, discoloration, itching, redness, or swelling at the application site
chest pain or discomfort
cold, clammy, or pale skin
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
drowsiness or dizziness
false or unusual sense of well-being
fear or nervousness
irregular, fast or slow, or shallow breathing
no blood pressure or pulse
pale or blue lips, fingernails, or skin
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
shakiness in the legs, arms, hands, or feet
slow heart rate
slow or irregular heartbeat
stopping of heart
trembling or shaking of the hands or feet
unusual tiredness or weakness
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not known
Bad, unusual, or unpleasant (after) taste
change in taste
cold or numbness
confusion about identity, place, and time
continuing ringing or buzzing or other unexplained noise in the ears
lack or loss of strength
sleepiness or unusual drowsiness
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.