(polymyxin B sulfate and trimethoprim ophthalmic solution, USP)
POLYTRIMÂ® (trimethoprim sulfate and polymyxin B sulfate ophthalmic solution) is a sterile antimicrobial solution for topical ophthalmic use. It has pH of 4.0 to 6.2 and osmolality of 270 to 310 m0sm/kg.
POLYTRIMÂ® Ophthalmic Solution is indicated in the treatment of surface ocular bacterial infections, including acute bacterial conjunctivitis, and blepharoconjunctivitis, caused by susceptible strains of the following microorganisms: Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus pneumoniae, Streptococcus viridans, Haemophilus influenzae
Pseudomonas aeruginosa. *
*Efficacy for this organism in this organ system was studied in fewer than 10 infections.
Published Studies Related to Polytrim (Trimethoprim / Polymyxin B Ophthalmic)
Penetration of topically administered ofloxacin and trimethoprim into aqueous humor. [2002.10]
Ocular penetration of two topical antibiotics used to treat bacterial conjunctivitis was assessed in adult volunteers scheduled for cataract surgery... The greater concentration of ofloxacin in ocular tissue coupled with its superior antibacterial activity profile supports its use as an alternative to trimethoprim/polymyxin B for treatment of bacterial conjunctivitis.
Antimicrobial efficacy and aqueous humor concentration of preoperative and postoperative topical trimethoprim/polymyxin B sulfate versus tobramycin. [1994.01]
We compared trimethoprim sulfate 0.1%/polymyxin B sulfate 10,000 units/mL with tobramycin 0.3% for preoperative sterilization of the ocular surface, aqueous humor concentration, and ocular safety and comfort in 99 patients who had cataract extraction and intraocular lens implantation... No significant differences were found in ocular safety and comfort.
Clinical comparison of topical solutions containing trimethoprim in treating ocular surface bacterial infections. [1988.06]
Thirty-nine patients with bacterial ocular surface infections (conjunctivitis, blepharitis or blepharoconjunctivitis) were evaluated after treatment with a topically applied ophthalmic solution containing trimethoprim. A combination of trimethoprim and polymixin B (TP) produced identical clinical and microbiologic responses when compared to a solution containing, in addition to trimethoprim and polymyxin B, sulfacetamide.
Trimethoprim-polymyxin B sulphate ophthalmic ointment in the treatment of bacterial conjunctivitis: a double-blind study versus chloramphenicol ophthalmic ointment. 
Forty-two patients with a clinical diagnosis of bacterial conjunctivitis were enrolled in a randomized, double-blind trial. Patients were treated with either trimethoprim-polymyxin B sulphate or chloramphenicol ophthalmic ointments 4-times a day for 7 days.Analysis of clinical evaluation data showed that both treatments were effective and well tolerated, and that there were no statistically significant differences between them with regard to eradication of organisms or clinical improvement.
The effect of trimethoprim-polymyxin B sulphate ophthalmic ointment and chloramphenicol ophthalmic ointment on the bacterial flora of the eye when administered to the operated and unoperated eyes of patients undergoing cataract surgery. 
Both eyes of patients undergoing cataract surgery were treated with an ointment preparation containing either trimethoprim 5 mg/g and polymyxin B sulphate 10,000 units/g, or chloramphenicol 1%. The antibiotic preparations were administered four times daily on the day prior to surgery, once in the morning prior to surgery and twice daily for fourteen days post-operatively...
Page last updated: 2006-01-31