Tobramycin Ophthalmic SolutionPronunciation
Dosage Form: ophthalmic solution
Tobramycin Ophthalmic Solution Description
Tobramycin Ophthalmic Solution, USP 0.3% is a sterile topical ophthalmic antibiotic formulation prepared specifically for topical therapy of external ophthalmic infections.
Each mL contains
Active: Tobramycin 3 mg (0.3%). Inactives: Boric Acid, Sodium Sulfate, Sodium Chloride, Tyloxapol and Purified Water. Sodium Hydroxide and/or Sulfuric Acid (to adjust pH). Tobramycin Ophthalmic Solution, USP 0.3% has a pH range between 7.0 and 8.0 and an osmolality of 260-320 mOsm/kg.
Preservative Added: Benzalkonium Chloride 0.1 mg (0.01%).
Tobramycin is a water-soluble aminoglycoside antibiotic active against a wide variety of gram-negative and gram-positive ophthalmic pathogens.
The chemical structure of tobramycin is
Molecular weight: 467.52
Molecular formula: C18H37N5O9
(2S,3R,4S,5S,6R) - 4 - amino - 2 - [(1S,2S,3R,4S,6R) - 4,6 - diamino - 3 - [(2R,3R,5S,6R) - 3 - amino - 6 - (aminomethyl) - 5 - hydroxyoxan - 2 - yl]oxy - 2 - hydroxycyclohexyl]oxy - 6 - (hydroxymethyl)oxane - 3,5 - diol;sulfuric acid
Tobramycin Ophthalmic Solution - Clinical Pharmacology
In Vitro Data: In vitro studies have demonstrated tobramycin is active against susceptible strains of the following microorganisms: Staphylococci, including S. aureus and S. epidermidis (coagulase-positive and coagulase-negative), including penicillin-resistant strains.
Streptococci, including some of the Group A-beta-hemolytic species, some nonhemolytic species, and some Streptococcus pneumoniae.
Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Enterobacter aerogenes, Proteus mirabilis, Morganella morganii, most Proteus vulgaris strains, Haemophilus influenzae and H. aegyptius, Moraxella lacunata, Acinetobacter calcoaceticus and some Neisseria species. Bacterial susceptibility studies demonstrate that in some cases, microorganisms resistant to gentamicin retain susceptibility to tobramycin.
Indications and Usage for Tobramycin Ophthalmic Solution
Tobramycin Ophthalmic Solution, USP 0.3% is a topical antibiotic indicated in the treatment of external infections of the eye and its adnexa caused by susceptible bacteria. Appropriate monitoring of bacterial response to topical antibiotic therapy should accompany the use of Tobramycin Ophthalmic Solution,USP 0.3%. Clinical studies have shown tobramycin to be safe and effective for use in children.
Tobramycin Ophthalmic Solution,USP 0.3% is contraindicated in patients with known hypersensitivity to any of its components.
FOR TOPICAL OPHTHALMIC USE ONLY - NOT FOR INJECTION INTO THE EYE
Sensitivity to topically applied aminoglycosides may occur in some patients. If a sensitivity reaction to Tobramycin Ophthalmic Solution, USP 0.3% occurs, discontinue use.
As with other antibiotic preparations, prolonged use may result in overgrowth of nonsusceptible organisms, including fungi. If superinfection occurs, appropriate therapy should be initiated. Cross-sensitivity to other aminoglycoside antibiotics may occur; if hypersensitivity develops with this product, discontinue use and institute appropriate therapy. Patients should be advised not to wear contact lenses if they have signs and symptoms of bacterial conjunctivitis.
Information For Patients
Do not touch dropper tip to any surface, as this may contaminate the solution.
Pregnancy Category B
Reproduction studies in three types of animals at doses up to thirty-three times the normal human systemic dose have revealed no evidence of impaired fertility or harm to the fetus due to tobramycin. There are, however, no adequate and well-controlled studies in pregnant women. Because animal studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed.
Because of the potential for adverse reactions in nursing infants from Tobramycin Ophthalmic Solution, USP 0.3%, a decision should be made whether to discontinue nursing the infant or discontinue the drug, taking into account the importance of the drug to the mother.
Safety and effectiveness in pediatric patients below the age of two months has not been established.
No overall clinical differences in safety or effectiveness have been observed between elderly and younger patients.
The most frequent adverse reactions to Tobramycin Ophthalmic Solution are hypersensitivity and localized ocular toxicity, including lid itching and swelling, and conjunctival erythema. These reactions occur in less than three of 100 patients treated with tobramycin. Similar reactions may occur with the topical use of other aminoglycoside antibiotics. Other adverse reactions have not been reported from tobramycin therapy; however, if topical ocular tobramycin is administered concomitantly with systemic aminoglycoside antibiotics, care should be taken to monitor the total serum concentration.
To report SUSPECTED ADVERSE REACTIONS, contact Bausch + Lomb, a division of Valeant Pharmaceuticals North America LLC, at 1-800-321-4576 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
Clinically apparent signs and symptoms of an overdose of Tobramycin Ophthalmic Solution, USP 0.3% (punctate keratitis, erythema, increased lacrimation, edema and lid itching) may be similar to adverse reaction effects seen in some patients.
Tobramycin Ophthalmic Solution Dosage and Administration
In mild to moderate disease, instill one or two drops into the affected eye(s) every four hours. In severe infections, instill two drops into the eye(s) hourly until improvement, following which treatment should be reduced prior to discontinuation.
DO NOT USE IF IMPRINTED NECKBAND IS NOT INTACT.
FOR TOPICAL OPHTHALMIC USE ONLY
How is Tobramycin Ophthalmic Solution Supplied
Tobramycin Ophthalmic Solution USP, 0.3% is supplied in a plastic bottle with a controlled drop tip and a tan polypropylene cap in the following size:
NDC 24208-290-05-10 mL bottle (5 mL fill)
Store at 2°-25°C (36°-77°F). Avoid excessive heat.
KEEP OUT OF REACH OF CHILDREN.
Revised July 2016
Bausch + Lomb, a division of Valeant Pharmaceuticals North America LLC, Bridgewater, NJ 08807 USA
©Bausch & Lomb Incorporated
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FOR TOPICAL OPHTHALMIC
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