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Econazole Foam

Generic Name: econazole nitrate
Dosage Form: aerosol, foam

Indications and Usage for Econazole Foam

Econazole Nitrate Topical Foam, 1%, is indicated for the treatment of interdigital tinea pedis caused by Trichophyton rubrum, Trichophyton mentagrophytes, and Epidermophyton floccosum in patients 12 years of age and older.

Econazole Foam Dosage and Administration

Econazole Nitrate Topical Foam, 1% is for topical use only. Econazole Nitrate Topical Foam, 1% is not for oral, ophthalmic, or intravaginal use.

Econazole Nitrate Topical Foam, 1% should be applied to cover affected areas once daily for 4 weeks.

Dosage Forms and Strengths

Foam, 1%. Each gram of Econazole Nitrate Topical Foam, 1%, contains 10 mg of econazole nitrate in a white to off-white foam.

Contraindications

None.

Warnings and Precautions

Flammability

Econazole Nitrate Topical Foam, 1% is flammable. Avoid heat, flame, and smoking during and immediately following application. Contents under pressure. Do not puncture and/or incinerate the containers. Do not expose containers to heat and/or store at temperatures above 120°F (49°C) even when empty. Do not store in direct sunlight.

Adverse Reactions

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

In two double-blind, vehicle-controlled clinical trials, 495 subjects were exposed to Econazole Nitrate Topical Foam, 1% or vehicle (246 subjects were exposed to Econazole Nitrate Topical Foam, 1% and 249 were exposed to vehicle). Subjects with interdigital tinea pedis applied foam or vehicle once daily for approximately 28 days. During clinical trials with Econazole Nitrate Topical Foam, 1%, the most common adverse reactions were application site reactions which occurred in less than 1% of subjects in both the Econazole Nitrate Topical Foam, 1% and vehicle arms. 

Drug Interactions

Warfarin

Concomitant administration of econazole and warfarin has resulted in enhancement of anticoagulant effect. Most cases reported product application with use under occlusion, genital application, or application to a large body surface area which may increase the systemic absorption of econazole nitrate. Monitoring of International Normalized Ratio (INR) and/or prothrombin time may be indicated especially for patients who apply econazole to large body surface areas, in the genital area, or under occlusion.

USE IN SPECIFIC POPULATIONS

Pregnancy

Pregnancy Category C

There are no adequate and well-controlled trials with Econazole Nitrate Topical Foam, 1% in pregnant women. Econazole Nitrate Topical Foam, 1% should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Econazole nitrate has not been shown to be teratogenic when administered orally to mice, rabbits or rats. Fetotoxic or embryotoxic effects were observed in Segment I oral studies with rats receiving 10 to 40 times the human dermal dose. Similar effects were observed in Segment II or Segment III studies with mice, rabbits and/or rats receiving oral doses 80 or 40 times the human dermal dose.

Nursing Mothers

It is not known whether econazole nitrate is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when econazole nitrate is administered to a nursing woman. Following oral administration of econazole nitrate to lactating rats, econazole and/or metabolites were excreted in milk and were found in nursing pups.

Pediatric Use

Of the 173 subjects treated with Econazole Nitrate Topical Foam, 1% in the clinical trials, 2 subjects were 12-17 years old.  In a pediatric maximal use trial, Econazole Nitrate Topical Foam, 1% was applied once daily to eighteen subjects aged 12 to 17 years with interdigital tinea pedis for 28 days [see Clinical Pharmacology (12.3)]. The safety findings for subjects 12 to 17 years were similar to those in adult population.

Geriatric Use

Of the 173 subjects treated with Econazole Nitrate Topical Foam, 1% in the adult clinical trials, 6 subjects were 65 years or older. No overall differences in safety or effectiveness were observed between these subjects and younger subjects.

Econazole Foam Description

Econazole Nitrate Topical Foam, 1% contains the azole antifungal agent, econazole nitrate in an oil-in-water emulsion base consisting of the following inactive ingredients: dimethicone, glycerin, polysorbate 20, povidone, propylene glycol, stearic acid, trolamine, purified water and butane as a propellant. Each gram of Econazole Nitrate Topical Foam, 1% contains 10 mg of econazole nitrate, USP, in a white to off-white foam. Econazole Nitrate Topical Foam, 1% is alcohol (ethanol)-free and for topical use only.

Chemically, econazole nitrate is 1-[2-{(4-chloro-phenyl)methoxy}-2-(2,4-dichlorophenyl)ethyl]-1H-imidazole mononitrate. Econazole nitrate has the molecular formula C18H15Cl3N2O.HNO3 and a molecular weight of 444.70. Its molecular structure is as follows:

Econazole Foam - Clinical Pharmacology

Mechanism of Action

Econazole Nitrate Topical Foam, 1% is an azole antifungal [see Clinical Pharmacology (12.4)].

Pharmacodynamics

The pharmacodynamics of Econazole Nitrate Topical Foam, 1% have not been established.

Pharmacokinetics

The systemic absorption of Econazole Nitrate Topical Foam, 1% following topical application was studied in one clinical trial in adults and one clinical study in pediatric subjects.

In the adult trial, 19 subjects (male and female) with tinea pedis applied Econazole Nitrate Topical Foam, 1% once daily for 29 days.  Subjects applied a mean daily amount of 2.4 g of Econazole Nitrate Topical Foam, 1% to soles, toes, interdigital spaces and tops of both feet up to the ankles. Blood samples were obtained on Day 29 at pre-dose and 1, 2, 4, 6, 8, and 12 hours after application.  Results (mean ± SD) showed the time to reach peak plasma concentrations (Tmax) was 6.8 ± 5.1 h with maximum concentration (Cmax) of 417 ± 218 pg/ml. The area under the concentration time curve for the first 12 hours post application on Day 29 (AUC(0-12)) was 3440 ± 1920 pg-h/ml. 

In the pediatric trial, 18 subjects (male and female ages 12 - 17) with interdigital tinea pedis and positive fungal cultures were treated with Econazole Nitrate Topical Foam, 1% once daily for 4 weeks.  Subjects applied a mean daily amount of 3.2 g of Econazole Nitrate Topical Foam, 1% to soles, toes, interdigital spaces and tops of both feet up to the ankles.  Blood samples were obtained on Day 28 at pre-dose and 7 h and 11 h post-dose. The mean ± SD econazole plasma concentration was 397 ± 289, 534 ± 745 and 575 ± 638 pg/mL at pre-dose and 7 h and 11 h post-dose, respectively.   

Microbiology

Mechanism of Action

Econazole nitrate, an azole antifungal agent, inhibits fungal cytochrome P-450-mediated 14 alpha-lanosterol demethylase enzyme. This enzyme functions to convert lanosterol to ergosterol. The accumulation of 14 alpha-methyl sterols correlates with the subsequent loss of ergosterol in the fungal cell wall and may be responsible for the fungistatic activity of econazole. Mammalian cell demethylation is less sensitive to econazole inhibition.

Activity in vitro and in clinical infections

Econazole nitrate has been shown to be active against most strains of the following microorganisms, both in vitro and in clinical infections [see Indications and Usage (1)].

Trichophyton rubrum
Epidermophyton floccosum
Trichophyton mentagrophytes

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment of Fertility

Long-term animal studies to determine the carcinogenic potential of Econazole Nitrate Topical Foam, 1% have not been performed.

Oral administration of econazole nitrate in rats has been reported to produce prolonged gestation.

Clinical Studies

In two multi-center, randomized, double-blind, vehicle-controlled clinical trials a total of 505 subjects with interdigital tinea pedis were randomized 1:1 to Econazole Nitrate Topical Foam, 1% or vehicle; subjects applied the assigned medication once daily for 4 weeks. The severity of erythema, scaling, fissuring, maceration, vesiculation, and pruritus were graded using a 4-point scale (none, mild, moderate, severe). Subjects had KOH examination and fungal cultures taken to confirm eligibility. A total of 339 subjects with positive fungal cultures were evaluated for efficacy. Efficacy was evaluated on Day 43, 2 weeks post-treatment with treatment success being defined as complete cure (negative KOH and fungal culture and no evidence of clinical disease). The study population ranged in age from 12 to 71 years with 3 subjects less than 18 years of age at baseline. The subjects were 71% male and 52% Caucasian. Table 1 presents the efficacy results for each trial.

Table 1: Efficacy Results at Two Weeks Post-treatment (Day 43) Complete Cure, Effective Treatment and Mycological Cure
Trial 1 Trial 2
Econazole Nitrate Topical Foam, 1%
N = 82
n(%)
Foam Vehicle
N = 83
n(%)
Econazole Nitrate Topical Foam, 1%
N = 91
n(%)
Foam Vehicle
N = 83
n(%)
*
Mycological cure and an absence of clinical signs and symptoms (erythema, scaling, fissuring, maceration, vesiculation, or pruritus).
Mycological cure and no or mild erythema and/or scaling with all other signs and symptoms absent.
Negative KOH and fungal culture.
Complete cure* 19 (23.2%) 2 (2.4%) 23 (25.3%) 4 (4.8%)
Effective treatment 40 (48.8%) 9 (10.8%) 44 (48.4%) 9 (10.8%)
Mycological cure 56 (68.3%) 13 (15.7%) 61 (67.0%) 15 (18.1%)

HOW SUPPLIED/ STORAGE AND HANDLING

Econazole Nitrate Topical Foam, 1% is white to off-white foam supplied in 70 g (NDC 70700-100-70) aluminum pressurized canister.

Store at controlled room temperature 20°C to 25°C (68°F to 77°F) with excursions permitted between 15°C and 30°C (59°F and 86°F). Do not refrigerate or freeze.

Econazole Nitrate Topical Foam, 1% is flammable. Avoid heat, flame, and smoking during and immediately following application.

Contents under pressure. Do not puncture and/or incinerate the containers.

Do not expose containers to heat and/or store at temperatures above 120°F (49°C) even when empty.

Do not store in direct sunlight.

Patient Counseling Information

See FDA-approved patient labeling (Patient Information)

The patient should be instructed as follows:

  • Inform patients that Econazole Nitrate Topical Foam, 1% is for topical use only. Econazole Nitrate Topical Foam, 1% is not intended for oral, intravaginal, or ophthalmic use.
  • Econazole Nitrate Topical Foam, 1% is flammable; avoid heat, flame, and smoking during and immediately following application.
  • If a reaction suggesting sensitivity or chemical irritation develops with the use of Econazole Nitrate Topical Foam, 1%, use of the medication should be discontinued.

Distrubuted by
Xiromed, LLC
Florham Park, NJ 07932

U.S, Patent 5,993,830

Issued: 09/2016

PI100-00

Patient Information
Econazole Nitrate Topical Foam, 1 %
Important information: Econazole Nitrate Topical Foam, 1% is for use on skin only. Do not use Econazole Nitrate Topical Foam, 1% in your eyes or vagina.
What is Econazole Nitrate Topical Foam, 1%?
Econazole Nitrate Topical Foam, 1% is a prescription medicine used on the skin (topical) to treat athlete's foot that is between the toes (interdigital tinea pedis) in people 12 years of age and older.
What should I tell my doctor before using Econazole Nitrate Topical Foam, 1%?
Before using Econazole Nitrate Topical Foam, 1%, tell your doctor about all of your medical conditions, including if you:
  • are pregnant or plan to become pregnant. It is not known if Econazole Nitrate Topical Foam, 1% will harm your unborn baby.
  • are breastfeeding or plan to breastfeed. It is not known if Econazole Nitrate Topical Foam, 1% passes into your breast milk.

Tell your doctor about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.
How should I use Econazole Nitrate Topical Foam, 1%?
See the detailed Instructions for Use for information about how to use Econazole Nitrate Topical Foam, 1%.
  • Use Econazole Nitrate Topical Foam, 1% exactly as your doctor tells you to use it.
  • Apply Econazole Nitrate Topical Foam, 1% to the affected skin areas of your feet 1 time a day for 4 weeks.
  • If Econazole Nitrate Topical Foam, 1% gets in or near your eyes, rinse them well with water.
  • Wash your hands after you apply Econazole Nitrate Topical Foam, 1%.
What should I avoid while using Econazole Nitrate Topical Foam, 1%?
  • Econazole Nitrate Topical Foam, 1% is flammable. Avoid heat, flame and smoking while applying and right after you apply Econazole Nitrate Topical Foam, 1% to your skin.
What are the possible side effects of Econazole Nitrate Topical Foam, 1%?
Econazole Nitrate Topical Foam, 1% may cause skin reactions at the treatment site. Tell your doctor if you have any skin reactions on the areas of your skin treated with Econazole Nitrate Topical Foam, 1%.
These are not all the possible side effects of Econazole Nitrate Topical Foam, 1%.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store Econazole Nitrate Topical Foam, 1%?
  • Store Econazole Nitrate Topical Foam, 1% at room temperature, between 68°F to 77°F (20°C to 25°C).
  • Do not refrigerate or freeze Econazole Nitrate Topical Foam, 1%.
  • Do not store Econazole Nitrate Topical Foam, 1% in direct sunlight.
  • Econazole Nitrate Topical Foam, 1% is flammable. Keep the Econazole Nitrate Topical Foam, 1% canister away from heat and temperatures above 120°F (49°C), even if the canister is empty.
  • Do not puncture or burn the Econazole Nitrate Topical Foam, 1% canister.

Keep Econazole Nitrate Topical Foam, 1% and all medicines out of the reach of children.
General information about the safe and effective use of Econazole Nitrate Topical Foam, 1%
Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. You can ask your doctor or pharmacist for information about Econazole Nitrate Topical Foam, 1% that is written for health professionals. Do not use Econazole Nitrate Topical Foam, 1% for a condition for which it was not prescribed. Do not give Econazole Nitrate Topical Foam, 1% to other people, even if they have the same symptoms that you have. It may harm them.
What are the ingredients in Econazole Nitrate Topical Foam, 1%?
Active ingredient: econazole nitrate, USP
Inactive Ingredients: dimethicone, glycerin, polysorbate 20, povidone, propylene glycol, stearic acid, trolamine, purified water and butane as a propellant.
Distributed by Xiromed, LLC, Florham Park, NJ 07932
For more information call Xiromed, LLC. at 844-XIROMED (844-947-6633).
This Patient Information has been approved by the U.S. Food and Drug Administration.                    Issued: 09/2016

Instructions for Use

Econazole Nitrate Topical Foam, 1%

 Important information: Econazole Nitrate Topical Foam, 1% is for use on skin only. Do not use Econazole Nitrate Topical Foam, 1% in your eyes or vagina.

Parts of Econazole Nitrate Topical Foam, 1% Canister. (See Figure A)


                                           Figure A

How to apply Econazole Nitrate Topical Foam, 1%:

Step 1: Before you apply Econazole Nitrate Topical Foam, 1%, shake the Econazole Nitrate Topical Foam, 1% canister for about 5 seconds.
Step 2: Remove the cap and turn the Econazole Nitrate Topical Foam, 1% canister upside down over the palm of your hand.
Step 3: Press down firmly on the actuator until there is a small amount of foam about the size of a golf ball in the palm of your hand. (See Figures B and C)
Figure B Figure C
Step 4: Use your finger-tips to scoop up small amounts of Econazole Nitrate Topical Foam, 1% and apply to the affected skin areas on your feet. Gently rub the foam into the skin. (See Figure D)


Figure D

Step 5: You should apply Econazole Nitrate Topical Foam, 1% to your toes, to the spaces between your toes, and to the surrounding areas 1 time a day for 4 weeks or as prescribed by your doctor.
Step 6: Replace the cap. Wash your hands after applying Econazole Nitrate Topical Foam, 1%.

How should I store Econazole Nitrate Topical Foam, 1%?

  • Store Econazole Nitrate Topical Foam, 1% at room temperature, between 68°F to 77°F (20°C to 25°C).
  • Do not refrigerate or freeze Econazole Nitrate Topical Foam, 1%.
  • Do not store Econazole Nitrate Topical Foam, 1% in direct sunlight.
  • Econazole Nitrate Topical Foam, 1% is flammable. Keep the Econazole Nitrate Topical Foam, 1% canister away from heat and temperatures above 120°F (49°C), even if the canister is empty.
  • Do not puncture or burn the Econazole Nitrate Topical Foam, 1% canister.

Keep Econazole Nitrate Topical Foam, 1% and all medicines out of the reach of children.

This Instructions for Use has been approved by the U.S. Food and Drug Administration.

Distributed by Xiromed, LLC, Florham Park, NJ 07932

Issued: 09/2016

PIL-100-00

PRINCIPAL DISPLAY PANEL - 70 g Can Label

NDC 70700-100-07

Econazole Nitrate Topical Foam, 1%

For Topical Use Only
Not for ophthalmic, oral or intravaginal use.

Keep Out of Reach of Children

Rx Only
Net Wt 70g

PRINCIPAL DISPLAY PANEL - 70 g Canister Carton

NDC 70700-100-70

Econazole Nitrate Topical Foam, 1%

For Topical Use Only
Not for ophthalmic, oral
or intravaginal use.

Keep Out of Reach of Children

Rx Only
Net Wt 70g

ECONAZOLE NITRATE TOPICAL FOAM, 1% 
econazole nitrate topical foam, 1% aerosol, foam
Product Information
Product Type HUMAN PRESCRIPTION DRUG LABEL Item Code (Source) NDC:70700-100
Route of Administration TOPICAL DEA Schedule     
Active Ingredient/Active Moiety
Ingredient Name Basis of Strength Strength
ECONAZOLE NITRATE (ECONAZOLE) ECONAZOLE NITRATE 10 mg  in 1 g
Inactive Ingredients
Ingredient Name Strength
DIMETHICONE  
GLYCERIN  
POLYSORBATE 20  
POVIDONE K29/32  
PROPYLENE GLYCOL  
STEARIC ACID  
TROLAMINE  
WATER  
BUTANE  
Product Characteristics
Color WHITE (white to off-white) Score     
Shape Size
Flavor Imprint Code
Contains         
Packaging
# Item Code Package Description
1 NDC:70700-100-07 1 CAN in 1 CARTON
1 70 g in 1 CAN
Marketing Information
Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date
NDA NDA205175 12/09/2016
Labeler - Xiromed LLC (080228637)
Registrant - Chemo Research, S.L. (464268393)
Establishment
Name Address ID/FEI Operations
DPT Laboratories, Ltd. 832224526 analysis(70700-100), label(70700-100), manufacture(70700-100), pack(70700-100)
Revised: 07/2016
 
Xiromed LLC
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