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All about: Neomycin,Polymyxin B,Gramicidin

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Generic Name: neomycin and polymyxin B sulfates and gramicidin
Dosage Form: Ophthalmic solution

Neomycin,Polymyxin B,Gramicidin Description

Neomycin and Polymyxin B Sulfates and Gramicidin Ophthalmic Solution USP is a sterile antimicrobial solution for ophthalmic use.

EACH mL CONTAINS: ACTIVES: Neomycin Sulfate, (equivalent to 1.75 mg neomycin base), Polymyxin B Sulfate equal to 10,000 Polymyxin B units, Gramicidin, 0.025 mg; INACTIVES: Sodium Chloride, Alcohol (0.5%), Poloxamer 188, Propylene Glycol, Purified Water. Hydrochloric Acid and/ or Ammonium Hydroxide may be added to adjust pH (4.7- 6.0).

PRESERVATIVE ADDED: Thimerosal 0.001%.

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 base per milligram, calculated on an anhydrous basis.

The structural formulae are:

Polymyxin B Sulfate is the sulfate salt of polymyxin Bl 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 milligram, calculated on an anhydrous basis. The structural formulae are:

Gramicidin (also called gramicidin D) is a mixture of three pairs of antibacterial substances (Gramicidin A, B and C) produced by the growth of Bacillusbrevis Dubos (Fam. Bacillaceae). It has a potency of not less than 900 mcg of standard gramicidin per mg. The structural formulae are:

Neomycin,Polymyxin B,Gramicidin - Clinical Pharmacology

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

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.

Gramicidin is bactericidal for a variety of gram-positive organisms. It increases the permeability of the bacterial cell membrane to inorganic cations by forming a network of channels through the normal lipid bilayer of the membrane.

Microbiology: Neomycin sulfate, polymyxin B sulfate and gramicidin 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.

Indications and Usage for Neomycin,Polymyxin B,Gramicidin

Neomycin and Polymyxin B Sulfates and Gramicidin Ophthalmic Solution 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

This product is contraindicated in those persons who have shown hypersensitivity to any of its components.

Warnings

NOT FOR INJECTION INTO THE EYE. This product should never be directly introduced into the anterior chamber of the eye or injected subconjunctivally.

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.

Applications 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 this product may result in overgrowth of nonsusceptible organisms including fungi. If superinfection occurs, appropriate measures should be initiated.

Bacterial resistance to this product 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 other allergic reaction 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 gramicidin. Treatment of cultured 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.

Pregnancy

Teratogenic effects

Pregnancy Category C. Adequate animal reproductive studies have not been conducted with neomycin, polymyxin B or gramicidin. It is also not known whether this product can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. This product should be given to a 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 this product is administered to a nursing woman.

Pediatric use

Safety and effectiveness in pediatric patients have not been established.

Adverse Reactions

Adverse reactions have occurred with the anti-infective components of this product. The exact incidence is not known. Reactions occurring most often are allergic 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.

Neomycin,Polymyxin B,Gramicidin Dosage and Administration

Instill one or two drops into the affected eye every 4 hours for 7 to 10 days. In severe infections, dosage may be increased to as much as two drops every hour.

DO NOT USE IF IMPRINTED "Protective Seal" WITH YELLOW IS NOT INTACT.

How is Neomycin,Polymyxin B,Gramicidin Supplied

Neomycin and Polymyxin B Sulfates and Gramicidin Ophthalmic Solution USP is supplied in a plastic squeeze bottle with a controlled drop tip in the following size:

10 mL – Prod. No. 03409

STORAGE

Store between 15°– 30° C (59°– 86° F).

PROTECT FROM LIGHT.

KEEP OUT OF REACH OF CHILDREN.

STERILE OPHTHALMIC SOLUTION

Rx Only

MANUFACTURER INFORMATION

Bausch & Lomb Incorporated
Tampa, FL 33637
©Bausch & Lomb Incorporated

XO50050 (Folded)
XM10032 (Flat)
REV. 11/03-62


Neomycin and Polymyxin B Sulfates and Gramicidin (Neomycin sulfate, Polymyxin B Sulfate and Gramicidin)
PRODUCT INFO
Product Code 24208-790 Dosage Form SOLUTION / DROPS
Route Of Administration OPHTHALMIC DEA Schedule
INGREDIENTS
Name (Active Moiety) Type Strength
Neomycin Sulfate (Neomycin) Active 1.75 MILLIGRAM  In 1 MILLILITER
Polymyxin B Sulfate (Polymyxin B) Active 10000 UNITS  In 1 MILLILITER
Gramicidin (Gramicidin) Active 0.025 MILLIGRAM  In 1 MILLILITER
Alcohol Inactive  
Ammonium Hydroxide Inactive  
Glycol Inactive  
Hydrochloric Acid Inactive  
Poloxamer 188 Inactive  
Propylene Inactive  
Water Inactive  
Sodium Chloride Inactive  
Thimerosal Inactive  
IMPRINT INFORMATION
Characteristic Appearance Characteristic Appearance
Color Score
Shape Symbol
Imprint Code Coating
Size
PACKAGING
# NDC Package Description Multilevel Packaging
1 24208-790-62 1 BOTTLE In 1 CARTON contains a BOTTLE, DROPPER
1 10 MILLILITER In 1 BOTTLE, DROPPER This package is contained within the CARTON (24208-790-62)

Revised: 02/2007

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