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Bacitracin (Ophthalmic)

Medically reviewed by Last updated on Jul 28, 2020.


(bas i TRAY sin)

Dosage Forms

Excipient information presented when available (limited, particularly for generics); consult specific product labeling.

Ointment, Ophthalmic:

Generic: 500 units/g (3.5 g)

Pharmacologic Category

  • Antibiotic, Ophthalmic


A cyclic peptide antibiotic that inhibits bacterial cell wall synthesis by preventing transfer of mucopeptides into the growing cell wall. Bacitracin is bacteriostatic in nature, but may be bactericidal depending on the antibiotic concentration and the susceptibility of the organism. The antibacterial spectrum is primarily gram positive with activity against staphylococci (including some penicillin G resistant strains), streptococci, anaerobic cocci, Clostridia, Corynebacterium, gonococci, meningococci, and fusobacteria. Other susceptible organisms include Treponema pallidum, Treponema vincentii, and Actinomyces israelii. Development of bacitracin resistance is rare; however, resistance to Staphylococcus aureus has been reported (Suzuki 2011).


Topical: Negligible

Use: Labeled Indications

Ocular infections: Treatment of blepharitis and associated bacterial overgrowth; treatment of superficial ocular infections involving the conjunctiva or cornea due to susceptible organisms


Hypersensitivity to bacitracin or any component of the formulation

Dosing: Adult

Ocular infections: Ophthalmic:

Blepharitis: Apply twice daily and at bedtime.

Superficial infections of the conjunctiva and/or cornea: Apply up to every 3 to 4 hours for 10 days as determined by severity of infection.

Dosing: Geriatric

Refer to adult dosing.

Dosing: Pediatric

Ophthalmic infection: Infants, Children, and Adolescents: Ophthalmic: Apply ribbon 1 to 3 times daily.


Ophthalmic: For topical ophthalmic use only; do not inject into the eye. Avoid contamination of ointment during application. Avoid excess ointment application. Patients should be instructed on proper administration of eye ointments. Do not touch the tip of the applicator to any part of the eye or surrounding adjacent areas.

Blepharitis: After carefully removing all scales and crusts, apply thin film uniformly over lid margins.

Superficial infections of the conjunctiva and/or cornea: Apply thin ¼ inch strip directly into conjunctival sac.


Store at 20°C to 25°C (68°F to 77°F).

Drug Interactions

There are no known significant interactions.

Adverse Reactions

The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified.

1% to 10%: Hypersensitivity: Hypersensitivity reaction (7% [Hätinen 1985])

<1%, postmarketing, and/or case reports: Contact dermatitis (Pichichero 2011)


Concerns related to adverse effects:

• Bacterial overgrowth: Prolonged use or use in absence of infectious presence may result in overgrowth of nonsusceptible organisms, particularly fungi; if new infection develops, initiate appropriate therapy.

• Blurred vision: May cause blurred vision, which may impair physical or mental abilities; patients must be cautioned about performing tasks that require clear vision (eg, operating machinery or driving).

• Hypersensitivity/anaphylaxis: Use with caution in patients who have been previously exposed to bacitracin; contact dermatitis (Pichichero 2011) has been reported and may take several days of use to develop. Discontinue use if signs of an allergic sensitization reaction are noted, including itching, swelling, and conjunctival erythema.

Special populations:

• Contact lens wearers: Contact lenses should not be worn during treatment.

Other warnings/precautions:

• Appropriate use: Should not be used in deep seated ocular infections or if infection is likely to become systemic. Patients who do not respond to topical ophthalmic bacitracin treatment following 10 days of use should be reevaluated to ascertain appropriateness of continued antibiotic use.

Pregnancy Considerations

Bacitracin is not absorbed systemically following ophthalmic administration (Robert 2001). If ophthalmic agents are needed during pregnancy, the minimum effective dose should be used in combination with punctal occlusion to decrease potential exposure to the fetus (Samples 1988).

Patient Education

What is this drug used for?

• It is used to treat eye infections.

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.

Consumer Information Use and Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a limited summary of general information about the medicine's uses from the patient education leaflet and is not intended to be comprehensive. This limited summary does NOT include all information available about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not intended to provide medical advice, diagnosis or treatment and does not replace information you receive from the healthcare provider. For a more detailed summary of information about the risks and benefits of using this medicine, please speak with your healthcare provider and review the entire patient education leaflet.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.