LMX 5 (Topical)
Generic Name: lidocaine and prilocaine (Gingival route)
Commonly used brand name(s)
In the U.S.
Available Dosage Forms:
Therapeutic Class: Anesthetic, Amino Amide Combination
Chemical Class: Amino Amide
Uses For LMX 5
Lidocaine and prilocaine periodontal (gingival) gel is used on the gums to cause numbness or loss of feeling during dental procedures. This medicine contains a mixture of two topical local anesthetics (numbing medicines). It deadens the nerve endings in the gum.
This medicine is available only with your dentist's prescription.
Before Using LMX 5
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies have not been performed on the relationship of age to the effects of lidocaine and prilocaine periodontal gel in the pediatric population. Safety and efficacy have not been established.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of lidocaine and prilocaine periodontal gel in the elderly. However, elderly patients are more likely to have age-related kidney or liver problems, which may require caution and an adjustment in the dose for patients receiving lidocaine and prilocaine periodontal gel.
|All Trimesters||B||Animal studies have revealed no evidence of harm to the fetus, however, there are no adequate studies in pregnant women OR animal studies have shown an adverse effect, but adequate studies in pregnant women have failed to demonstrate a risk to the fetus.|
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Interactions with Medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Interactions with Food/Tobacco/Alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other Medical Problems
The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:
- Glucose-6-phosphate dehydrogenase (G6PD) deficiency, history of or
- Heart disease or
- Heart rhythm problems—May cause side effects to become worse.
- Methemoglobinemia (blood disorder), history of—Should not use in patients with this condition.
- Liver disease, severe—Use with caution. The effects may be increased because of slower removal of the medicine from the body.
Proper Use of lidocaine
This section provides information on the proper use of a number of products that contain lidocaine. It may not be specific to LMX 5. Please read with care.
A dentist or other trained health professional will give you this medicine in an office or clinic setting. The medicine is applied to the gums using a special dispenser.
Precautions While Using LMX 5
It is very important that your dentist check you closely for any problems or unwanted effects that may be caused by this medicine.
This medicine may cause serious types of allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Tell your dentist right away if you have a rash; itching; hoarseness; trouble with breathing; trouble with swallowing; or any swelling of your hands, face, or mouth after you receive the medicine.
This medicine may cause a rare, but serious blood problem called methemoglobinemia. Call your dentist right away if you develop a blue or bluish purple color on the lips, fingernails, or skin, or have headaches, dizziness, fainting, sleepiness, or trouble with breathing after you receive this medicine.
During the time that the gum feels numb, serious injury can occur. Be especially careful to avoid injury until the numbness wears off and you have normal feeling in the area. Avoid foods or liquids that are very hot or very cold. Do not chew gum or food while your mouth feels numb. You may accidentally bite your tongue or the inside of your cheeks.
LMX 5 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 or nurse immediately if any of the following side effects occur:More common
- Gum numbness that continues
- gum swelling or irritation
- hoarseness or trouble with swallowing
- shortness of breath
- swelling of the eyelids, face, lips, or tongue
- tightness in the chest
- trouble with breathing
- Blue or blue-purple color of lips, fingernails, mouth, or skin
- blurred or double vision
- dark urine
- dizziness or drowsiness
- feeling hot, cold, or numb
- irregular or fast heartbeat
- muscle twitching or trembling
- nausea or vomiting
- ringing or buzzing in the ears
- shortness of breath or troubled breathing
- unusual excitement, nervousness, or restlessness
- 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:More common
- Bad or bitter taste
- mouth pain or soreness
- mouth ulcers
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.
See also: Side effects (in more detail)
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