Neomycin and Polymyxin B Sulfates, and Bacitracin Zinc

CLINICAL PHARMACOLOGY

A wide range of antibacterial action is provided by the overlapping spectra of neomycin, polymyxin B sulfate, and bacitracin.

Neomycin is bactericidal for many gram-positive and gram-negative organisms. It is an aminoglycoside antibiotic, which inhibits protein synthesis by binding with ribosomal RNA and causing misreading of the bacterial genetic code.

Polymyxin B is bactericidal for a variety of gram-negative organisms. It increases the permeability of the bacterial cell membrane by interacting with the phospholipid components of the membrane.

Bacitracin is bactericidal for a variety of gram-positive and gram-negative organisms. It interferes with bacterial cell wall synthesis by inhibition of the regeneration of phospholipid receptors involved in peptidoglycan synthesis.

Microbiology: Neomycin sulfate, polymyxin B sulfate and bacitracin zinc together are considered active against the following microorganisms: Staphylococcus aureus, streptococci including Streptococcus pneumonia, Escherichiacoli, Haemophilusinfluenzae, Klebsiella/Enterobacter species, Neisseria species, and Pseudomonas aeruginosa. The product does not provide adequate coverage against Serratia marcescens.

INDICATIONS AND USAGE

Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment. USP is indicated for the topical treatment of superficial infections of the external eye and its adnexa caused by susceptible bacteria. Such infections encompass conjunctivitis, keratitis and keratoconjunctivitis, blepharitis and blepharoconjunctivitis.

CONTRAINDICATIONS

Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP is contraindicated in individuals who have shown hypersensitivity to any of its components.

WARNINGS

NOT FOR INJECTION INTO THE EYE. Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ointment, USP should never be directly introduced into the anterior chamber of the eye. Ophthalmic ointments may retard corneal wound healing.

Topical antibiotics, particularly neomycin sulfate, may cause cutaneous sensitization. A precise incidence of hypersensitivity reactions (primarily skin rash) due to topical antibiotics is not known. The manifestations of sensitization to topical antibiotics are usually itching, reddening, and edema of the conjunctiva and eyelid. A sensitization reaction may manifest simply as a failure to heal. During long-term use of topical antibiotic products periodic examination for such signs is advisable, and the patient should be told to discontinue the product if they are observed. Symptoms usually subside quickly on withdrawing the medication. Application of products containing these ingredients should be avoided for the patient thereafter (see PRECAUTIONS: General).

PRECAUTIONS

General: As with other antibiotic preparations, prolonged use of Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP may result in overgrowth of nonsusceptible organisms including fungi. If superinfection occurs, appropriate measures should be initiated.

Bacterial resistance to Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP may also develop. If purulent discharge, inflammation, or pain becomes aggravated, the patient should discontinue use of the medication and consult a physician.

There have been reports of bacterial keratitis associated with the use of topical ophthalmic products in multiple-dose containers, which have been inadvertently contaminated by patients, most of whom had a concurrent corneal disease or a disruption of the ocular epithelial surface (see PRECAUTIONS: Information for Patients).

Allergic cross-reactions may occur which could prevent the use of any or all of the following antibiotics for the treatment of future infections: kanamycin, paromomycin, streptomycin and possibly gentamicin.

Information for Patients: Patients should be instructed to avoid allowing the tip of the dispensing container to contact the eye, eyelid, fingers, or any other surface. The use of this product by more than one person may spread infection.

Patients should also be instructed that ocular products, if handled improperly, can become contaminated by common bacteria known to cause ocular infections. Serious damage to the eye and subsequent loss of vision may result from using contaminated products (see PRECAUTIONS: General).

If the condition persists or gets worse, or if a rash or allergic action develops, the patient should be advised to stop use and consult a physician, Do not use this product if you are allergic to any of the listed ingredients.

Keep tightly closed when not in use. Keep out of reach of children.

Carcinogenesis, Mutagenesis, Impairment of Fertility: Long-term studies in animals to evaluate carcinogenic or mutagenic potential have not been conducted with polymyxin B sulfate or bacitracin. Treatment of cultured human lymphocytes in vitro with neomycin increased the frequency of chromosome aberrations at the highest concentration (80 mcg/mL) tested; however, the effects of neomycin on carcinogenesis and mutagenesis in humans are unknown.

Polymyxin B has been reported to impair the motility of equine sperm, but its effects on male or female fertility are unknown. No adverse effects on male or female fertility, liter size or survival were observed in rabbits given bacitracin zinc 100 gm/ton of diet.

Pregnancy: Teratogenic Effects: Pregnancy Category C Animal reproduction studies have not been conducted with neomycin sulfate, polymyxin B sulfate, or bacitracin. It is also not known whether Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP should be given to pregnant woman only if clearly needed.

Nursing Mothers: It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP is administered to a nursing woman.

Pediatric Use: Safety and effectiveness in pediatric patients have not been established.

Geriatric Use: No overall differences in safety or effectiveness have been observed between elderly and younger patients.

ADVERSE REACTIONS

Adverse reactions have occurred with the anti-infective components of Neomycin and Polymyxin B Sulfate and Bacitracin Zinc Ophthalmic Ointment, USP. The exact incidence is not known. Reactions occurring most often are allergic sensitization reactions including itching, swelling, and conjunctival erythema (see WARNINGS). More serious hypersensitivity reactions, including anaphylaxis, have been reported rarely.

Local irritation on instillation has also been reported.

DOSAGE AND ADMINISTRATION

Apply the ointment every 3 or 4 hours for 7 to 10 days, depending on the severity of the infection.

HOW SUPPLIED

Tube of 1/8 oz. (3.5 g) with ophthalmic tip.

NDC 17478-235-35

Storage: Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].

Akorn
Manufactured By: Akorn, Inc.
Lake Forest, IL 60045

NPB00N
Rev. 01/11

Principal Display Panel Text for Container Label:

NDC 17478-235-35 Akorn Logo
Neomycin and Polymyxin B Sulfates, and
Bacitracin Zinc Ophthalmic Ointment, USP
Sterile Ophthalmic Ointment
Rx only Net Wt. 3.5 g (1/8 oz)