Aurizon Ear Drops, Suspension

Composition

Each ml contains:

Active substances:

Marbofloxacin 3.0 mg

Clotrimazole 10.0 mg

Dexamethasone 0.9 mg

(equivalent to dexamethasone acetate 1.0 mg)

Excipients:

Homogenous beige to yellow oily suspension.

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Pharmacological properties

4.1 ATCVet Code: QS02CA06

4.2 Pharmacodynamics

The veterinary medicinal product combines three active ingredients:

- Marbofloxacin, a synthetic bactericidal agent belonging to the fluoroquinolone family that acts by inhibiting DNA gyrase. It exhibits a broad spectrum of activity against Gram-positive bacteria (e.g. Staphylococcus intermedius) and against Gram-negative organisms (Pseudomonas aeruginosa, Escherichia coli and Proteus mirabilis).

- Clotrimazole, an anti-fungal agent that belongs to the imidazole family and which acts by causing changes in membrane permeability, allowing intracellular compounds to leak from the cell and thus inhibiting cellular molecular synthesis. It exhibits a wide spectrum of activity and is aimed, in particular, at Malassezia pachydermatis;

- Dexamethasone acetate, a synthetic glucocorticoid exhibiting anti-inflammatory and anti-pruritic activity.

4.3 Pharmacokinetics

Pharmacokinetics studies in dogs at the therapeutic dosage have shown that: Marbofloxacin plasma concentrations peak at 0.06 µg/ml on the 14th day of treatment.

Marbofloxacin bonds weakly to plasma proteins (< 10% in dogs) and is eliminated slowly, mainly in the active form, over 2/3 in urine and over 1/3 in fæces.

Clotrimazole absorption is extremely poor (plasma concentration < 0.04 µg/ml).

Dexamethasone acetate plasma concentration reaches 1.25 ng/ml on the 14th day of treatment. Dexamethasone resorption is not increased by the inflammatory process induced by otitis.

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Target species

Dogs.

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Indications

Treatment of otitis externa of both bacterial and fungal origin respectively due to bacteria sensitive to marbofloxacin, and fungi especially Malassezia pachydermatis sensitive to clotrimazole.

The veterinary medicinal product should be used based on susceptibility testing results.

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Dosage

Auricular use.

Shake well before use.

Apply ten drops into the ear once daily for 7 to 14 days.

After 7 days of treatment, the veterinary surgeon should evaluate the necessity to extend the treatment another week.

One drop of the veterinary medicinal product contains 71 µg marbofloxacin, 237 µg clotrimazole and 23.7 µg dexamethasone acetate.

After application, the base of the ear may be massaged briefly and gently to allow the veterinary medical product to penetrate to the lower part of the ear canal.

When the veterinary medicinal product is intended for use in several dogs, use one cannula per dog.

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Contraindications

Do not use in dogs suffering from perforation of the tympanic membrane.

Do not use in cases of hypersensitivity to the active substances, other azole antifungals or fluoroquinolones or to any of the excipient.

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Adverse reactions

Dogs:

1 Mainly in elderly dogs and mostly of a transient nature.

2 Usual adverse effects of corticosteroids.

3 Known adverse effects of topical corticosteroids in case of prolonged and intensive use.

4 Suppression of adrenal function.

Reporting adverse events is important. It allows continuous safety monitoring of a veterinary medicinal product. Reports should be sent, preferably via a veterinarian, to either the marketing authorisation holder or the national competent authority via the national reporting system. See the package leaflet for respective contact details.

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Warnings

Special precautions for safe use in the target species:

Heavy reliance on a single class of antibiotic may result in the induction of resistance in a bacterial population. It is prudent to reserve the fluoroquinolones for the treatment of clinical conditions which have responded poorly, or are expected to respond poorly, to other classes of antibiotics.

Before treating with the veterinary medicinal product, the integrity of the tympanic membrane must be verified.

The external ear canal should be meticulously cleaned and dried before treatment.

Special precautions to be taken by the person administering the veterinary medicinal product to animals:

Wash hands carefully after applying the veterinary medicinal product.

Avoid contact with eyes. In case of accidental contact with the eyes, rinse with copious amounts of water.

People with known hypersensitivity to the active substances or excipients should avoid contact with the veterinary medicinal product.

Special precautions for the protection of the environment:

Not applicable

3.11 Special restrictions for use and special conditions for use, including restrictions on the use of antimicrobial and antiparasitic veterinary medicinal products in order to limit the risk of development of resistance

Not applicable.

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Use during pregnancy, lactation or lay

Pregnancy and lactation:

Do not use during pregnancy or during lactation.

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Interactions

None known

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Overdose

Changes in biochemical and hæmatological parameters (such as increase of alkaline phosphatase, aminotransferase, some limited neutrophilia, eosinopenia, lymphopenia) are observed with three fold the recommended dosage; such changes are not serious and will reverse once the treatment has stopped.

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Special warnings

None.

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Withdrawal period

Not applicable.

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Incompatibilities

None known.

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Immediate packaging

10, 20 or 30 mL low-density polyethylene (LDPE) bottle with a low-density polyethylene nozzle and a threaded polypropylene (PP) cap and 1, 2 or 3 PVC cannulae in a cardboard box.

Box containing one 10 ml bottle with 1 cannula.

Box containing one 20 ml bottle with 2 cannulae.

Box containing one 30 ml bottle with 3 cannulae.

Not all pack sizes may be marketed.

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Storage

Do not store above 30°C.

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Shelf life

Shelf life of the veterinary medicinal product as packaged for sale:2 years. Shelf life after first opening the immediate packaging: 2 months.

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Disposal of unused product

Medicines should not be disposed of via wastewater.

Use take-back schemes for the disposal of any unused veterinary medicinal product or waste materials derived thereof in accordance with local requirements and with any national collection systems applicable to the veterinary medicinal product concerned.

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Additional information

Vm 08007/5038

8 DATE OF FIRST AUTHORISATION

19 July 2001

9 DATE OF THE LAST REVISION OF THE SUMMARY OF THE PRODUCT CHARACTERISTICS

November 2025

10 CLASSIFICATION OF VETERINARY MEDICINAL PRODUCT

Veterinary medicinal product subject to prescription.

Find more product information by searching for the ‘Product Information Database’ on www.gov.uk.

Approved: 03 November 2025

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Registration holder

Vetoquinol UK Limited

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