CNL8

Generic name: ciclopirox topical
Brand names: Ciclodan, Ciclodan Kit, CNL8 Nail, Loprox, Pedipirox-4, Penlac Nail Lacquer
Drug class: Topical antifungals

Medically reviewed by  A Ras MD.

What is CNL8?

CNL8 is a prescription medicine that is used to treat some nail problems.

Description

CNL8 (ciclopirox topical solution, 8%) nail lacquer.

For use on fingernails and toenails and immediately adjacent skin only.

Not for use in eyes.

CNL8 (ciclopirox topical solution, 8%) nail lacquer contains a synthetic antifungal agent, ciclopirox. It is intended for topical use on fingernails and toenails and immediately adjacent skin.

Each gram of CNL8 (ciclopirox topical solution, 8%) nail lacquer contains 80 mg ciclopirox in a solution base consisting of ethyl acetate, NF; isopropyl alcohol, USP; and butyl monoester of poly[methylvinyl ether/maleic acid] in isopropyl alcohol. Ethyl acetate and isopropyl alcohol are solvents that vaporize after application.

CNL8 (ciclopirox topical solution, 8%) nail lacquer is a clear, colorless to slightly yellowish solution.

The chemical name for ciclopirox is 6-cyclohexyl-1-hydroxy-4-methyl-2(1H)-pyridone, with the molecular formula C12H17NO2 and a molecular weight of 207.27. The CAS Registry Number is 29342-05-0. The chemical structure is:

 

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Mechanism of Action

The mechanism of action of ciclopirox has been investigated using various in vitro and in vivo infection models. One in vitro study suggested that ciclopirox acts by chelation of polyvalent cations (Fe+3 or Al+3) resulting in the inhibition of the metal-dependent enzymes that are responsible for the degradation of peroxides within the fungal cell. The clinical significance of this observation is not known.

Activity in vitro and ex vivo:  In vitro methodologies employing various broth or solid media with and without additional nutrients have been utilized to determine ciclopirox minimum inhibitory concentration (MIC) values for the dermatophytic molds.(1-2) As a consequence, a broad range of MIC values, 1-20 mcg/mL were obtained for Trichophyton rubrum and Trichophyton mentagrophytes species. Correlation between in vitro MIC results and clinical outcome has yet to be established for ciclopirox.

One ex vivo study was conducted evaluating 8% ciclopirox against new and established Trichophyton rubrum and Trichophyton mentagrophytes infections in ovine hoof material.(3) After 10 days of treatment the growth of T. rubrum and T. mentagrophytes in the established infection model was very minimally affected. Elimination of the molds from hoof material was not achieved in either the new or established for infection models.

Susceptibility testing for Trichophyton rubrum species: In vitro susceptibility testing methods for determining ciclopirox MIC values against the dermatophytic molds, including Trichophyton rubrum species, have not been standardized or validated. Ciclopirox MIC values will vary depending on the susceptibility testing method employed, composition and pH of media and the utilization of nutritional supplements. Breakpoints to determine whether clinical isolates of Trichophyton rubrum are susceptible or resistant to ciclopirox have not been established.

Resistance Studies: have not been conducted to evaluate drug resistance development in T. rubrum species exposed to 8% ciclopirox topical solution. Studies assessing crossresistance to ciclopirox and other known antifungal agents have not been performed.

Antifungal Drug Interaction: No studies have been conducted to determine whether ciclopirox might reduce the effectiveness of systemic antifungal agents for onychomycosis. Therefore, the concomitant use of 8% ciclopirox topical solution and systemic antifungal agents for onychomycosis is not recommended

 

Before taking CNL8, tell your doctor:

  • If you are allergic to CNL8; any part of this medicine; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.

This medicine may interact with other drugs or health problems.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take CNL8 with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take CNL8?

  • Tell all of your health care providers that you take CNL8. This includes your doctors, nurses, pharmacists, and dentists.
  • Talk with your doctor before you use other drugs or products on your skin.
  • This medicine may cause harm if swallowed. If CNL8 is swallowed, call a doctor or poison control center right away.
  • This medicine may catch on fire. Do not use near an open flame or while smoking.
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using CNL8 while you are pregnant.
  • Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is CNL8 best taken?

Use CNL8 as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • Use as you have been told, even if your signs get better.
  • Do not take CNL8 by mouth. Use on your nails and the skin around your nails only. Keep out of your mouth, nose, ears, and eyes.
  • Read the package insert for more details.
  • Use 8 hours before bathing.
  • Use on nails and nail beds every day.
  • Take off once weekly with rubbing alcohol.
  • Do not use nail polish or other products on nails when using CNL8.

What do I do if I miss a dose?

  • Put on a missed dose as soon as you think about it.
  • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
  • Do not put on 2 doses or extra doses.

What are the side effects of CNL8 that I need to call my doctor about immediately?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Irritation where CNL8 is used.
  • Swelling.
  • Blisters or sores.
  • Oozing or bleeding.
  • Burning.
  • Redness.

What are some other side effects of CNL8?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Change in skin or finger nails.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.

If overdose is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out CNL8?

  • Store at room temperature.
  • Store nail solution in the original container after each use.
  • Protect from heat or open flame.
  • Protect from light.
  • Store in a dry place. Do not store in a bathroom.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

 

Label

PRINCIPAL DISPLAY PANEL

 

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SRC: NLM .