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Peptide

Bacitracin

Antibiotic of bacterial origin used mainly in ointments for minor skin wounds, alone or combined with neomycin and polymyxin B.
Regulatory status
Approved (FDA / EMA)
Family
Polypeptide antibiotic
Scientific evidence
Low-moderate
Number of findings
1
Where it acts
Skin and aging · Immunity and defense
Also known as
bacitracin, bacitracin zinc, Baciim, Neosporin (combination)

Regulatory status

FDA (U.S.): Approved as a topical ointment (over the counter) to prevent infection in minor cuts and burns. The injectable form was withdrawn: in 2020 the FDA requested its removal from the market because of the risk of serious kidney damage and little benefit.

EMA (EU): No centralized EMA authorization; in Europe there are topical preparations authorized at the national level (for example, in combination with neomycin).

Dose

Topical use: apply a thin layer to the wound 1 to 3 times a day, for no more than 7 days without medical advice (FDA over-the-counter labeling).

Safety

It is a frequent cause of allergic contact dermatitis. Very rare severe allergic reactions (including anaphylaxis) have been described. The injectable form caused kidney damage and is no longer marketed in the US.

Effect by goal · level of evidence

Prevention of infection in surgical skin wounds

no clear effect Moderate RCT (AA) in people
0.9% vs 2.0% (n.s.)

922 patients undergoing outpatient dermatologic surgery. Infection was low and similar with bacitracin (0.9%) and with petrolatum alone (2.0%), with no significant difference. With bacitracin there were 4 cases of allergic contact dermatitis and none with petrolatum.

View the study (RCT) →

In depth

Where it acts

Skin and aging, Immunity and defense

How it works

It prevents bacteria from building their cell wall by blocking the recycling of a carrier molecule (bactoprenol). It acts mainly against gram-positive bacteria, such as staphylococci and streptococci.

What the evidence says

In people

  • Prevention of infection in surgical skin wounds. 922 patients undergoing outpatient dermatologic surgery. Infection was low and similar with bacitracin (0.9%) and with petrolatum alone (2.0%), with no significant difference. With bacitracin there were 4 cases of allergic contact dermatitis and none with petrolatum. PubMed 8805732

References

  1. PubMed 8805732

Information, not medical advice. Prescription or unapproved peptides should only be used under medical supervision.

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