Naseptin (Neomycin / Chlorhexidine Hydrochloride)
Is It Right for You?
A complete guide to Naseptin (Neomycin/Chlorhexidine) — what it treats, how it works, dosages, side effects, and when a clinician may prescribe it following an online consultation.
What Is Naseptin (Neomycin / Chlorhexidine Hydrochloride)?
Naseptin is a topical antimicrobial nasal cream containing two active ingredients: neomycin sulphate 0.5% and chlorhexidine hydrochloride 0.1%. It is manufactured by Alliance Pharmaceuticals and is available only on prescription. Each gram of Naseptin cream contains 3,250 International Units (IU) of neomycin sulphate and 1 mg of chlorhexidine hydrochloride, in a white, oil-in-water cream base that is formulated specifically for intranasal application.
The combination of a broad-spectrum aminoglycoside antibiotic (neomycin) with an antiseptic agent (chlorhexidine) provides dual antimicrobial activity against the Gram-positive nasal flora — particularly Staphylococcus aureus — responsible for the majority of conditions for which Naseptin is prescribed. This dual mechanism reduces the likelihood of resistance development compared with a single antimicrobial agent.
Naseptin cream is applied inside the nostrils and is not suitable for use in deep nasal passages, sinuses, or on other body surfaces. It is one of the most widely used preparations in primary care for nasal MRSA decolonisation and nasal vestibulitis.
What Conditions Does Naseptin Treat?
Naseptin is prescribed for:
The anterior nasal vestibule is one of the primary carriage sites for Staphylococcus aureus, including MRSA. Asymptomatic nasal carriage of MRSA is clinically important because carriers can transmit the organism to others (particularly in healthcare settings) and are at increased risk of invasive MRSA infection following surgery, procedures, or hospitalisation. Naseptin is commonly prescribed for MRSA nasal decolonisation as part of broader decolonisation protocols — typically in combination with a chlorhexidine body wash and occasionally mupirocin (Bactroban) nasal ointment in higher-risk settings. While mupirocin is now preferred in many MRSA decolonisation protocols due to its superior activity against MRSA (including meticillin-resistant strains), Naseptin is used in patients where mupirocin resistance is a concern or when a combination approach is required.
Nasal vestibulitis is a superficial infection or inflammation of the skin lining the nasal vestibule (the entrance to the nose), most commonly caused by Staphylococcus aureus. It presents with redness, crusting, soreness, and occasionally furuncles (boils) at the base of the nasal hairs (nasal folliculitis). It is often triggered by repeated nose-picking, nose-blowing, or nasal hair plucking. Naseptin applied topically to the nasal vestibule is an effective treatment, addressing both the causative organism and preventing re-infection.
Patients with recurrent impetigo or skin infections caused by S. aureus are frequently nasal carriers of the organism, which acts as a reservoir for repeated self-infection (autoinfection) or infection of close contacts. Naseptin nasal cream, used as part of a broader decolonisation approach, can reduce the bacterial nasal reservoir and decrease the frequency of recurrent skin infections.
Recurrent epistaxis from the anterior nasal septum (Little's area) is commonly associated with crusting and local staphylococcal colonisation that irritates and damages the fragile nasal septal mucosa. Naseptin is frequently prescribed as an adjunct to other management (such as cautery), providing antibacterial cover that promotes mucosal healing and reduces recurrence from the infective component of anterior nasal crusting.
While Naseptin is effective for managing nasal conditions, it should be used cautiously in patients with a history of allergic reactions to its components.
How Does Naseptin Work?
Neomycin (Aminoglycoside Antibiotic Component)
Neomycin is a bactericidal aminoglycoside antibiotic that binds irreversibly to the 30S ribosomal subunit of bacteria, causing misreading of the genetic code during translation of mRNA into protein. This results in incorporation of incorrect amino acids into bacterial proteins, producing non-functional or toxic proteins that cause bacterial cell death. Neomycin is active against a wide range of Gram-positive and Gram-negative aerobic bacteria, including most S. aureus strains, though MRSA resistance patterns vary. Its poor systemic absorption from topical application means it can be used topically at concentrations that would be toxic if given systemically.
Chlorhexidine (Antiseptic Component)
Chlorhexidine is a broad-spectrum cationic antiseptic that acts by disrupting bacterial cell membranes. It binds to negatively charged phospholipid components of the bacterial membrane and penetrates the cell, causing leakage of cytoplasmic contents and cell death. Chlorhexidine is active against Gram-positive bacteria (including S. aureus and MRSA), Gram-negative bacteria, and some fungi and viruses. Because it acts via a non-specific physical mechanism (membrane disruption) rather than targeting specific bacterial enzymes or structures, it does not develop resistance in the way antibiotic drugs do.
The combination of neomycin and chlorhexidine provides complementary mechanisms of action, broader antimicrobial activity, and a reduced likelihood of resistance selection compared with either agent alone.
Dosages & Administration
The correct dose depends on the type and severity of infection, age, weight, and kidney function. Always follow your clinician's instructions. The table below is for general reference only.
Administration Tips
Always follow your clinician's instructions. Naseptin should be applied inside the nostrils using a clean fingertip or cotton bud, targeting the nasal vestibule. Avoid deep insertion into the nasal passages.
Side Effects of Naseptin
- Mild nasal irritation or burning
- Itching inside the nose
- Unpleasant taste or smell
- Severe allergic reaction — swelling of face, lips, or throat, difficulty breathing
- Contact dermatitis — severe redness, itching, or rash around the nose
- Ototoxicity (very rare) — risk if used improperly in the ear with a perforated eardrum (due to neomycin)
- Allergic reactions — including localized dermatitis or anaphylaxis in sensitive individuals.
Patients should be informed about the risk of allergic reactions and the importance of not using Naseptin if they have a known allergy to its components.
Drug Interactions
Inform your clinician about all medications you are taking, as some drugs may interact with Naseptin and affect its efficacy.
May reduce the effectiveness of chlorhexidine if used concurrently in the same area; avoid simultaneous application.
Important Warnings
Naseptin contains arachis oil. Do not use if you are allergic to peanuts or soya. Inform your clinician of any nut allergies before this is prescribed.
Prolonged use increases the risk of developing contact allergy to neomycin. If the condition worsens or you develop increasing redness, swelling, and itching in the nostril area, stop using the cream and contact your clinician. Do not use Naseptin for longer than recommended.
Chlorhexidine is widely used in healthcare settings. Any suspected allergy or reaction should be documented and reported to your clinician, as it may affect future clinical care.
Speak to a Clinician About Treatment
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The treatment you need, when you need it.
Naseptin FAQs
Both are topical nasal antibiotic preparations used for S. aureus and MRSA nasal decolonisation. Mupirocin (Bactroban nasal ointment) is generally considered the gold standard for MRSA decolonisation in high-risk settings due to its superior activity specifically against MRSA strains. However, mupirocin-resistant MRSA has emerged, particularly with repeated courses, and in these cases Naseptin may be used as an alternative or in combination. Naseptin is also used more broadly for non-MRSA staphylococcal nasal infections (vestibulitis, recurrent carriage) and as part of long-term suppressive regimens where the full-strength mupirocin protocol is not required.
For MRSA decolonisation, Naseptin is typically used four times daily for 5–10 days as part of a formal decolonisation protocol. For nasal vestibulitis, 7–10 days is usually sufficient. For longer-term suppressive use (e.g. recurrent epistaxis associated with anterior nasal crusting), courses of 4–6 weeks at lower frequency are sometimes prescribed. Long-term continuous use is discouraged due to sensitisation risk.
Naseptin is used in children for appropriate indications, but the peanut oil content means it must not be used in children with peanut allergy. Age-appropriate dosing and application by a parent or carer is required in younger children. The risk-benefit balance should be assessed by the prescribing clinician.
Recurrent anterior nosebleeds (epistaxis from Little's area on the nasal septum) are often associated with local crusting, dryness, and staphylococcal colonisation that irritates the septal mucosa. Naseptin can help by reducing the local bacterial load and promoting mucosal healing. It is usually used alongside other management options such as cauterisation of bleeding vessels, saline nasal irrigation, and avoidance of nasal trauma (nose-picking). It should not be used as the only treatment for significant recurrent epistaxis without clinician assessment.
A mild, brief stinging or tingling sensation on application is common and usually settles quickly. This is a normal local response to the antiseptic components. If the stinging is severe, persists, or is accompanied by increasing redness, swelling, or itching, discontinue use and contact your clinician, as this may indicate a contact allergic reaction.