Medically reviewed on September 8, 2017
What is Blistex?
Allantoin is a skin protectant.
Camphor and phenol are mild topical (for the skin) pain relievers.
Blistex is a combination medicine used to treat pain, itching, or severe lip dryness caused by chapped lips or cold sores (fever blisters).
This medicine will not cure herpes simplex, the virus that causes cold sores.
Blistex may also be used for purposes not listed in this medication guide.
Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not use this medicine if you are allergic to allantoin, camphor, or phenol topical, or to any of the other ingredients of the ointment, including menthol, bees wax, glycerin, lanolin, mineral oil, and paraffin.
This medicine is not expected to be harmful to use during pregnancy or while breast-feeding a baby.
Do not allow a very young child to use this medicine without adult supervision.
How should I use Blistex?
Use exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
To treat chapped lips, apply enough of this medicine to completely moisten the lips.
For best results when treating a cold sore, use the medicine when you first notice any symptoms such as tingling, itching, or other discomfort.
Remove any excess medicine with a clean tissue.
Wait at least 5 minutes before applying lipstick or other cosmetics over the treated lip areas.
It is best not to apply this medicine more than 4 times daily. Do not apply this medicine over large surfaces of your skin, or cover treated skin with a bandage or other covering.
Call your doctor if your symptoms do not improve, or if they get worse while using this medicine.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Since this medicine is used as needed, you are not likely to be on a dosing schedule. Using extra ointment to make up a missed dose will not make the medicine more effective.
What happens if I overdose?
An overdose of this medicine is unlikely to occur. Seek emergency medical attention or call the Poison Help line at 1-800-222-1222 if anyone has accidentally swallowed the medication.
What should I avoid while using Blistex?
This medicine is for use only on the skin. Avoid getting the medicine in your mouth or eyes. Rinse with water if this occurs.
Avoid using this medicine on a deep skin wound or on freshly shaven skin.
Blistex side effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have severe burning, stinging, redness, or other irritation after applying the ointment.
Common side effects may include:
mild tingling or cool feeling after applying the medicine; or
a white residue on your lips.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect Blistex?
It is not likely that other drugs you take orally or inject will have an effect on topically applied Blistex. But many drugs can interact with each other. Tell each of your health care providers about all medicines you use, including prescription and over-the-counter medicines, vitamins, and herbal products.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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