Gramicidin
/api/v1/drug/gramicidinMechanism of action
Sourced from openFDAMechanism-of-action class: Protein Synthesis Inhibitors.
Indications
Sourced from openFDA- Neomycin and polymyxin B sulfates and gramicidin ophthalmic solution is indicated for the topical treatment of superficial infections of the external eye and its adnexa caused by susceptible bacteria. Such infections encompass conjunctivitis, keratitis and keratoconjunctivitis, blepharitis and blepharoconjunctivitis.ICD-10: H10.9
Contraindications
Sourced from openFDA- This product is contraindicated in those persons who have shown hypersensitivity to any of its components.contraindicated
Dosage & administration
Sourced from openFDAInstill one or two drops into the affected eye every 4 hours for 7 to 10 days. In severe infections, dosage may be increased to as much as two drops every hour. donot
Warnings & precautions
Sourced from openFDANOT FOR INJECTION INTO THE EYE. This product should never be directly introduced into the anterior chamber of the eye or injected subconjunctivally. Topical antibiotics, particularly neomycin sulfate, may cause cutaneous sensitization. A precise incidence of hypersensitivity reactions (primarily skin rash) due to topical antibiotics is not known. The manifestations of sensitization to topical antibiotics are usually itching, reddening and edema of the conjunctiva and eyelid. A sensitization reaction may manifest simply as a failure to heal. During long-term use of topical antibiotic products, periodic examination for such signs is advisable, and the patient should be told to discontinue the product if they are observed. Symptoms usually subside quickly on withdrawing the medication. Applications of products containing these ingredients should be avoided for the patient thereafter (see PRECAUTIONS : Error! Hyperlink reference not valid. ).
Adverse reactions
Sourced from openFDAAdverse reactions have occurred with the anti-infective components of this product. The exact incidence is not known. Reactions occurring most often are allergic reactions including itching, swelling, and conjunctival erythema (see WARNINGS ). More serious hypersensitivity reactions, including anaphylaxis, have been reported rarely. Local irritation on instillation has also been reported. To report SUSPECTED ADVERSE REACTIONS, contact Bausch & Lomb Incorporated at 1-800-553-5340 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
Use in specific populations
Sourced from openFDAPregnancy: Teratogenic Effects Adequate animal reproductive studies have not been conducted with neomycin, polymyxin B, or gramicidin. It is also not known whether this product can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. This product should be given to a pregnant woman only if clearly needed.
Approval history
Sourced from openFDA- Jan 31, 1996ANDAANDA064047Bausch And Lomb Inc
FAERS reports
- 1Drug Ineffective450%
- 2Macular Degeneration450%
- 3Anaphylactic Reaction113%
- 4Bronchospasm113%
- 5Condition Aggravated113%
- 6Drug Dispensing Error113%
- 7Dry Eye113%
- 8Ear Discomfort113%
- 9Expired Product Administered113%
- 10Eye Irritation113%
- 11Eye Pain113%
- 12Eye Pruritus113%
- 13Eye Swelling113%
- 14Eyelid Disorder113%
- 15Foreign Body Sensation In Eyes113%
Literature
Recent PubMed references pinned to Gramicidin as a MeSH major topic. Citations link to pubmed.ncbi.nlm.nih.gov.
- Distinct membrane interaction mechanisms of gramicidin A and S in mammalian cells: A combined experimental and molecular dynamics study.Colloids and surfaces. B, Biointerfaces · 2026 · Necula G, Zorila B, Moisa Stoica R, et al.PMID 41950888DOI 10.1016/j.colsurfb.2026.115678
- Design and Mechanistic Study of Pf-15: A Linear Antimicrobial Peptide Derived from Gramicidin S Skeleton.Journal of agricultural and food chemistry · 2026 · Wang Z, Peng S, Wang L, et al.PMID 41733505DOI 10.1021/acs.jafc.5c12939
- Effect of Cholesterol on the Gramicidin A Induced Membrane Curvature and Order Parameter.Chemphyschem : a European journal of chemical physics and physical chemistry · 2026 · Srivastava D, Mukherjee S, Begom M, et al.PMID 41666259DOI 10.1002/cphc.202500755
- Electric field-induced rupture kinetics of giant unilamellar vesicles with varying gramicidin A content in membrane.PloS one · 2026 · Bhuiyan MTI, Ahamed MJ, Sultana R, et al.PMID 41490057DOI 10.1371/journal.pone.0338817
- Biointerfacial mechanical responses of supported lipid membranes to Gramicidin D revealed by QCM-D.Colloids and surfaces. B, Biointerfaces · 2026 · Seherler Ş, Kılıç APMID 41478155DOI 10.1016/j.colsurfb.2025.115399
- Rigidity vs Activity: Design of Gramicidin S Analogs against Multidrug-Resistant Bacteria Based on Molecular Engineering.Journal of medicinal chemistry · 2025 · Śleziak M, Panek JJ, Janek T, et al.PMID 41026514DOI 10.1021/acs.jmedchem.5c01234
- Adsorption of Bovine Serum Albumin to Lipid Membranes Increases the Number and Stability of Ion Channels of Gramicidin A.Langmuir : the ACS journal of surfaces and colloids · 2025 · Kondrashov OV, Rokitskaya TI, Denieva ZG, et al.PMID 40973088DOI 10.1021/acs.langmuir.5c02629
- Identification of novel Gramicidin S analogs from Aneurinibacillus aneurinilyticus isolated from corn steep liquor with potential antifungal activity.Microbial cell factories · 2025 · Lvova K, Marcos M, Pérez-Cid B, et al.PMID 40890732DOI 10.1186/s12934-025-02835-5
Clinical trials
The 9 most recently updated of 9 ClinicalTrials.gov registrations naming Gramicidin as an intervention. Registration is not evidence of efficacy or safety — reference crosswalk only.
- Safety, Tolerability, and Pharmacokinetic Profile of Grammidin With Anesthetic, a Metered Dose Topical Spray in Healthy VolunteersRecruiting · Phase 1 · Interventional · 24 enrolled · Valenta Pharm JSCNCT06857890updated 2025-07-10
- Study to Evaluate the Efficacy and Safety of Different Doses of Graminidin With Anesthetic, a Metered Dose Topical Spray, in the Treatment of Acute Infectious and Inflammatory Pharyngeal Diseases Compared With Drug Septolete Total, LozengesRecruiting · Phase 2 · Interventional · 300 enrolled · Valenta Pharm JSCNCT06843018updated 2025-07-10
- Safety, Tolerability, and Pharmacokinetic Profile of Grammidin, a Metered Dose Topical Spray in Healthy VolunteersRecruiting · Phase 1 · Interventional · 24 enrolled · Valenta Pharm JSCNCT06859281updated 2025-07-10
- Phage Therapy for the Prevention and Treatment of Wound Infections in Burned PatientsUnknown · Phase 1 · Interventional · 12 enrolled · Precisio Biotix Therapeutics, Inc.NCT04323475updated 2021-12-22
- Frozen Versus Fresh Corneal Carriers for the Boston KPro Type I Donor CarriersCompleted · Interventional · 37 enrolled · Marie-Claude RobertNCT01950598updated 2021-01-28
- Topical Antibiotics for Prevention of Intensive Care Unit (ICU) Central Line InfectionsWithdrawn · Interventional · 0 enrolled · Fraser HealthNCT00990392updated 2015-05-29
- Comparison Between Bandage Contact Lens and Pressure Patching for The Erosion Area and Pain Scale in Corneal Erosion PatientsCompleted · Phase 3 · Interventional · 32 enrolled · Udayana UniversityNCT01809483updated 2013-03-12
- A Randomized Clinical Trial of the Effect of Pimecrolimus Cream 1% Compared With Topical Corticosteroid in Treatment of Erosive Oral Lichen PlanusUnknown · Phase 2 · Interventional · 40 enrolled · Mashhad University of Medical SciencesNCT01524744updated 2012-02-02
- Comparison of Combination Antibiotics Eyedrop to Artificial Tear in Hordeolum After Incision and CurettageUnknown · Phase 3 · Interventional · 120 enrolled · Chulalongkorn UniversityNCT00534391updated 2010-11-23
Frequently asked questions
- How does Gramicidin work?
- Mechanism-of-action class: Protein Synthesis Inhibitors.
- What is Gramicidin used for?
- According to FDA labeling, Gramicidin carries indications including: Neomycin and polymyxin B sulfates and gramicidin ophthalmic solution is indicated for the topical treatment of superficial infections of the external eye and its adnexa caused by susceptible bacteria. Such infections encompass conjunctivitis, keratitis and keratoconjunctivitis, blepharitis and blepharoconjunctivitis.. This is a reference summary of labeled uses, not medical advice or a treatment recommendation.
- What class of drug is Gramicidin?
- Gramicidin is classified as Antibiotics, Protein Synthesis Inhibitors, Decreased Protein Synthesis.
- What are the contraindications for Gramicidin?
- Gramicidin labeling lists contraindications including: This product is contraindicated in those persons who have shown hypersensitivity to any of its components.. Always consult the full prescribing information and a clinician.
gramicidin is illustrative MVP content compiled from public sources. pharmacopeia is for educational and informational use only and is not a substitute for professional medical advice.