Bacitracin (Topical)
Bacitracin zinc
Brand names:Baciguent, Neosporin (combination product)
A polypeptide antibiotic for topical use, providing gram-positive coverage for minor cuts, abrasions, and burns. Bacitracin is commonly carried in tactical and individual first aid kits as an over-the-counter wound ointment. The drug is not used systemically due to nephrotoxicity.
Pharmacology and Actions
Bacitracin inhibits bacterial cell wall synthesis by interfering with dephosphorylation of the lipid carrier required to transport peptidoglycan precursors across the cell membrane. Spectrum is limited to gram-positive organisms including Staphylococcus aureus (variable, with increasing resistance) and Streptococcus species. The drug has minimal gram-negative activity. Resistance in community Staphylococcus has reduced bacitracin's clinical utility for established infections.
Indications
- Minor cuts, scrapes, and superficial wounds (preventive)
- Minor burn care (first-degree and superficial second-degree)
- Postoperative wound care for clean surgical sites
- Tactical and individual first aid kit topical antibiotic
Absolute Contraindications
- Known bacitracin or related polypeptide antibiotic allergy
- Open or deep wounds requiring systemic antibiotic therapy
- Application to large body surface areas with potential systemic absorption
Precautions and Side Effects
Contact dermatitis is the most common adverse effect and is increasingly recognized; bacitracin is a frequent cause of allergic contact dermatitis. Anaphylaxis to topical bacitracin has been reported, though rare. Application to large open wounds can result in systemic absorption with nephrotoxicity, which is why bacitracin is not used systemically. Avoid concurrent use with other ototoxic or nephrotoxic medications when applied to large wounds.
Adult Dosing
Pediatric Dosing
Topical pediatric application same as adult, applied sparingly. Avoid application to large body surface areas in infants.
Pharmacokinetics
Peak Effect: Topical: localized antibacterial effect within minutes of application
Duration: 8 to 12 hours per application
Storage and Handling
Store at controlled room temperature (15 to 30 degrees Celsius). Protect from heat extremes. Discard after expiration date or if appearance changes.
Reconstitution:
Topical ointment requires no reconstitution. Inspect tube before use; discard if contaminated.
TCCC and TECC Role
Bacitracin is not a TCCC core wound management agent. The TCCC approach to combat wounds emphasizes hemorrhage control, wound packing with hemostatic dressings, and systemic antibiotic prophylaxis (cefadroxil or ceftriaxone) rather than topical antibiotic ointments. Bacitracin's role is in minor cuts, abrasions, and burns that do not meet the threshold for systemic antibiotic prophylaxis. Individual first aid kits and IFAKs commonly carry bacitracin or a triple-antibiotic combination (bacitracin/neomycin/polymyxin B) for minor wound care.
Bacitracin is the ointment providers grew up with in the IFAK and the medicine cabinet. Its real role in tactical settings is minor injuries: small lacerations, scrapes, blistered hands, minor burns. For combat wounds requiring tourniquets, packing, or surgical care, topical bacitracin is not the answer; systemic antibiotics and definitive wound care are. The other consideration is the increasing recognition of bacitracin contact dermatitis. If a casualty develops new rash at the application site after a few days, suspect bacitracin allergy and discontinue.
Applying bacitracin to a serious wound and considering it adequate antibiotic coverage. Topical bacitracin does not substitute for systemic antibiotic prophylaxis in penetrating trauma, complex lacerations, or any wound that breaches deep tissue. Use bacitracin only for minor superficial wounds, and use systemic antibiotics per TCCC for combat wounds.
This drug profile is provided as educational reference material for trained medical providers. It is not medical advice, not a substitute for formal training, and not a substitute for current published guidelines or medical direction.
Drug administration is governed by your scope of practice, agency standing orders, medical director protocols, and applicable state and federal regulations. Controlled substances are subject to additional handling, accountability, and documentation requirements per DEA and state law. Always verify dosing, indications, contraindications, and route of administration against current published guidelines and your local protocols before administration.
If this content is being viewed during a medical emergency, call 911 immediately and follow the direction of your local emergency dispatch and medical control. Do not use this reference as a substitute for emergency medical services.
Drug information evolves. Last reviewed dates and source citations are provided for each entry. Confirm currency against the cited source before clinical use.
Penn Tactical Solutions publishes this reference for educational purposes. PTS does not provide medical direction and does not assume responsibility for clinical decisions made in the field. Clinical responsibility rests with the administering provider, their medical director, and their agency.
Educational reference for trained medical providers. Not medical advice. Not a substitute for formal training, current published guidelines, or medical direction. Drug administration is governed by your scope of practice, agency standing orders, medical director protocols, and applicable state and federal regulations. Controlled substances require additional storage, accountability, and documentation per DEA and state law.
In a medical emergency, call 911. This reference is not a substitute for emergency medical services.
Verify dosing, indications, and contraindications against current published guidelines and your local protocols before administration. Confirm content currency against the source citation. Penn Tactical Solutions does not provide medical direction. Clinical responsibility rests with the administering provider, their medical director, and their agency.
Bacitracin (Topical)
| IV/IO | Not used systemically due to nephrotoxicity. |