(erythromycin topical) Gel USP 2%
For Dermatologic Use Only-Not for Ophthalmic Use
ERYGEL® (erythromycin topical gel) Topical Gel contains erythromycin (3R*, 4S*, 5S*,6R*,7R*, 9R*, 11R*, 12R*, 13S*, 14R*)-4-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-14-ethyl-7,12, 13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-ß-D-xylo-hexopyranosyl] oxy] oxacy-clotetradecane-2,10-dione), for topical dermatological use. Erythromycin is a macrolide antibiotic produced from a strain of Saccaropolyspora erythraea (formerly Streptomyces erythreus). It is a base and readily forms salts with acids.
Chemically, erythromycin is C37H67NO13. It has the following structural formula:
Erythromycin has a molecular weight of 733.94. It is a white or slightly yellow, odorless or practically odorless, bitter crystalline powder. Erythromycin is very soluble in very polar organic solvents such as alcohols, acetone, chloroform, acetonitrile and ethyl acetate. It is moderately soluble in less polar solvents such as ether, dichloroethyl-ene and amyl acetate. It is slightly soluble in nonpolar solvents such as hexane. It is very poorly soluble in water.
Each gram of ERYGEL® (erythromycin topical gel) Topical Gel contains 20 mg of erythromycin, USP in a base of alcohol 92% and hydroxypropyl cellulose.
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ERYGEL® (erythromycin topical gel) Topical Gel is indicated for the topical treatment of acne vulgaris.
DOSAGE AND ADMINISTRATION
ERYGEL® (erythromycin topical gel) Topical Gel should be applied sparingly as a thin film to affected area(s) once or twice a day after the skin is thoroughly cleansed and patted dry. If there has been no improvement after 6 to 8 weeks, or if the condition becomes worse, treatment should be discontinued, and the physician should be reconsulted. Spread the medication lightly rather than rubbing it in. There are no data directly comparing the safety and efficacy of b.i.d. versus q.d. dosing.
ERYGEL® (Erythromycin Topical Gel USP) 2% is supplied in plastic tubes in the following sizes: 30 g - NDC 0023-4312-30 and 60 g - NDC 0023-4312-60.
Note: FLAMMABLE. Keep away from heat and flame. Store and dispense in original container. Keep tube tightly closed. Store between 15° and 25°C (59° and 77°F).
Distributed by: Merz Pharmaceuticals, Greensboro, NC 27410. Rev 1/00. FDA revision date: 12/9/2002
In controlled clinical trials, the incidence of burning associated with ERYGEL® (erythromycin topical gel) Topical Gel was approximately 25%. The following additional local adverse reactions have been reported occasionally: peeling, dryness, itching, erythema, and oiliness. Irritation of the eyes and tenderness of the skin have also been reported with the topical use of erythromycin. Ageneralized urticarial reaction, possibly related to the use of erythromycin, which required systemic steroid therapy has been reported.
No information provided.
Pseudomembranous colitis has been reported with nearly all antibacterial agents, including erythromycin, and may range in severity from mild to life-threatening. Therefore, it is important to consider this diagnosis in patients who present with diarrhea subsequent to the administration of antibacterial agents.
Treatment with antibacterial agents alters the normal flora of the colon and may permit overgrowth of clostridia. Studies indicate that a toxin produced by Clostridium difficile is one primary cause of “antibiotic-associated colitis”.
After the diagnosis of pseudomembranous colitis has been established, therapeutic measures should be initiated. Mild cases of pseudomembranous colitis usually respond to drug discontinuation alone. In moderate to severe cases, consideration should be given to management with fluids and electrolytes, protein supplementation and treatment with an antibacterial drug clinically effective against C. difficile colitis.
General: For topical use only; not for ophthalmic use. Concomitant topical acne therapy should be used with caution because a possible cumulative irritancy effect may occur, especially with the use of peeling, desquamating or abrasive agents. The use of antibiotic agents may be associated with the overgrowth of antibiotic-resistant organisms. If this occurs, discontinue use and take appropriate measures.
Avoid contact with eyes and all mucous membranes.
Carcinogenesis, Mutagenesis, Impairment of Fertility: No animal studies have been performed to evaluate carcinogenic and mutagenic potential or effects on fertility of topical erythromycin. However, long-term (2-year) oral studies in rats with erythromycin ethylsuccinate and erythromycin base did not provide evidence of tumorigenicity. There was no apparent effect on male or female fertility in rats fed erythromycin (base) at levels up to 0.25% of diet.
Pregnancy: Teratogenic effects: Pregnancy Category B: There was no evidence of teratogenicity or any other adverse effect on reproduction in female rats fed erythromycin base (up to 0.25% of diet) prior to and during mating, during gestation and through weaning of two successive litters. There are, however, no adequate and well controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should be used in pregnancy only if clearly needed. Erythromycin has been reported to cross the placental barrier in humans, but fetal plasma levels are generally low.
Nursing Women: It is not known whether erythromycin is excreted in human milk after topical application. However, erythromycin is excreted in human milk following oral and parenteral erythromycin administration. Therefore, caution should be exercised when erythromycin is administered to a nursing woman.
Pediatric Use: Safety and effectiveness in pediatric patients have not been established.
Erythromycin acts by inhibition of protein synthesis in susceptible organisms by reversibly binding to 50S ribosomal subunits, thereby inhibiting translocation of aminoacyl transfer-RNAand inhibiting polypeptide synthesis. Antagonism has been demonstrated in vitro between erythromycin, lincomycin, chloramphenicol, and clindamycin.
Patients using ERYGEL® (erythromycin topical gel) Topical Gel should receive the following information and instructions:
This medication should not be used for any disorder other than that for which it was prescribed.
Patients should not use any other topical acne medication unless otherwise directed by their physician.
Patients should report to their physician any signs of local adverse reactions.
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