Neomycin and Polymyxin B Sulfates and Bacitracin Zinc

Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP is a sterile antimicrobial ointment for topical ophthalmic use. Each gram contains: neomycin sulfate equivalent to 3.5 mg neomycin base, polymyxin B sulfate equivalent to 10,000 polymyxin B units, and bacitracin zinc equivalent to 400 bacitracin units and petrolatum q.s.

Neomycin sulfate is the sulfate salt of neomycin B and C, which are produced by the growth of Streptomyces fradiae Waksman (Fam. Streptomycetaceae). It has a potency equivalent of not less than 600 micrograms of neomycin standard per mg, calculated on an anhydrous basis. The structural formulae are:
 

Polymyxin B sulfate is the sulfate salt of polymyxin B₁ and B₂ which are produced by the growth of Bacillus polymyxa (Prazmowski) Migula (Fam. Bacillaceae). It has a potency of not less than 6,000 polymyxin B units per mg, calculated on an anhydrous basis. The structural formulae are:

Bacitracin zinc is the zinc salt of bacitracin, a mixture of related cyclic polypeptides (mainly bacitracin A) produced by the growth of an organism of the licheniformis group of Bacillus subtilis var Tracy. It has a potency of not less than 40 bacitracin units per mg. The structural formula is:

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 pneumoniae, Escherichia coli, Haemophilus influenzae, Klebsiella/Enterobacter species, Neisseria species, and Pseudomonas aeruginosa. The product does not provide adequate coverage against Serratia marcescens.

Neomycin and polymyxin B sulfates and bacitracin zinc ophthalmic ointment 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.

Neomycin and polymyxin B sulfates and bacitracin zinc ophthalmic ointment is contraindicated in individuals who have shown hypersensitivity to any of its components.

NOT FOR INJECTION INTO THE EYE. Neomycin and polymyxin B sulfates and bacitracin zinc ophthalmic ointment 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).

Adverse reactions have occurred with the anti-infective components of neomycin and polymyxin B sulfates and bacitracin zinc ophthalmic ointment. 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.

To report SUSPECTED ADVERSE REACTIONS, contact Rising Pharma Holdings, Inc. at (1-844-874-7464) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Apply the ointment topically into the conjunctival sac of the affected eye(s) every 3 or 4 hours for 7 to 10 days, depending on the severity of the infection.

Neomycin and Polymyxin B Sulfates and Bacitracin Zinc Ophthalmic Ointment, USP is supplied in a tube of 1/8 oz (3.5 g) with an ophthalmic tip (NDC 16571-754-53).

Caution: Federal law prohibits dispensing without a prescription.

Store at 15°C to 25°C (59°F to 77°F).

FOR TOPICAL OPHTHALMIC USE

Distributed by:
Rising Pharma Holdings, Inc.
East Brunswick, NJ 08816

Issued: 02/2021

PIA75453-00

Made in Canada

Rising®           NDC 16571-754-53

Neomycin and Polymyxin B Sulfates and
Bacitracin Zinc Ophthalmic Ointment, USP
Net wt. 1/8 oz. (3.5g)

Sterile              Rx Only