undecylenic acid (Topical route)
Commonly used brand name(s)
In the U.S.
Available Dosage Forms:
Therapeutic Class: Antifungal
Uses For undecylenic acid
Compound undecylenic acid belongs to the group of medicines called antifungals. It is used to treat some types of fungus infections. However, compound undecylenic acid generally has been replaced by newer and more effective medicines for the treatment of fungus infections.
Compound undecylenic acid is available without a prescription.
Before Using undecylenic acid
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 undecylenic acid, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to undecylenic acid 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.
Compound undecylenic acid should not be used on children up to 2 years of age, unless otherwise directed by your doctor. Although there is no specific information comparing use of compound undecylenic acid topical preparations in children 2 years of age and older with use in other age groups, undecylenic acid is not expected to cause different side effects or problems in children 2 years of age and older than it does in adults.
Many medicines have not been studied specifically in older people. Therefore, it may not be known whether they work exactly the same way they do in younger adults or if they cause different side effects or problems in older people. There is no specific information comparing use of compound undecylenic acid in the elderly with use in other age groups.
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. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.
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.
Proper Use of undecylenic acid
Before applying compound undecylenic acid, wash the affected and surrounding areas, and dry thoroughly. Then apply enough medicine to cover these areas.
Keep undecylenic acid away from the eyes.
For patients using the cream form of undecylenic acid:
- Apply cream generously to affected and surrounding areas. Rub in well.
- Do not use on pus-containing sores or on badly broken skin.
For patients using the powder form of undecylenic acid:
- If the powder is used on the feet, sprinkle it between toes, on feet, and in socks and shoes.
For patients using the aerosol powder or aerosol foam form of undecylenic acid:
- From a distance of 4 to 6 inches, spray the affected and surrounding areas. If the medicine is used on the feet, spray it between the toes also. The powder may also be sprayed in socks and shoes.
- Do not use undecylenic acid around the eyes, nose, or mouth.
- Do not inhale the aerosol.
- Do not use near heat, near open flame, or while smoking.
To help clear up your infection completely, keep using undecylenic acid for 2 weeks after burning, itching, or other symptoms have disappeared , unless otherwise directed by your doctor. Do not miss any doses.
The dose of undecylenic acid will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of undecylenic acid. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For fungus infections:
- For aerosol foam, aerosol powder, ointment, powder, or solution dosage forms:
- Adults and children 2 years of age and over—Apply to the affected area(s) of the skin two times a day.
- Children up to 2 years of age—Use is not recommended.
- For cream dosage form:
- Adults and children—Apply to the affected area(s) of the skin as often as necessary.
- For aerosol foam, aerosol powder, ointment, powder, or solution dosage forms:
If you miss a dose of undecylenic acid, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Store the canister at room temperature, away from heat and direct light. Do not freeze. Do not keep undecylenic acid inside a car where it could be exposed to extreme heat or cold. Do not poke holes in the canister or throw it into a fire, even if the canister is empty.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Precautions While Using undecylenic acid
If your skin problem does not improve within 4 weeks, or if it becomes worse, check with your health care professional.
To help prevent reinfection after the period of treatment with undecylenic acid, the powder or spray powder form of undecylenic acid may be used each day after bathing and careful drying.
undecylenic acid 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 as soon as possible if any of the following side effects occur:
- Skin irritation not present before use of undecylenic acid
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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