Hornex 42.7% w/w Cutaneous Paste

Composition

Qualitative composition Quantitative composition

Active substance:

Sodium hydroxide 42.7% w/w

For a full list of excipients see section 6.1

6.1 List of excipients

Acetylsalicyclic acid

Arachis Oil

Water

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Pharmaceutical form

Cutaneous paste.

A pale pink to white buttery textured paste.

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Pharmacological properties

Pharmacotherapeutic group: Dermatological

ATC Vet Code: QD11AX

5.1 Pharmacodynamic properties

Caustic action, causing breakdown of horn tissue to ensure removal of the horn buds.

5.2 Pharmacokinetic properties

The product acts topically resulting in the destruction of tissue to which it is applied.

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Target species

Calves not more than 7 days old.

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Indications

For the removal of embryo horns on calves not older than 7 days old.

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Dosage

Remove the hair around the embryo horn by cutting. Smear petroleum jelly around the bud, then apply paste to cover the entire horn bud, using the enclosed applicator. Dose per embryo horn is approximately 0.22 g paste, and is the size of a small pea. One application is usually sufficient. Do not allow paste to become wet following application.

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Contraindications

Do not allow paste to become wet following application. Do not apply to calves over 7 days old.

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Adverse reactions

If paste should enter calves’ eye(s), flush liberally with clean water.

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Warnings

i. Special precautions for use in animals

Smear petroleum jelly around the bud before application. The operator should wear protective gloves to apply the paste. Allow 1 ½ hours of dry weather when applying paste. Keep paste away from animal’s eyes. Keep cow away from calf for half an hour after application of paste.

ii. Special precautions for the person administering the veterinary medicinal product to animals

Caustic. Personal protection equipment should be worn to prevent contact with skin – wear household rubber gloves, heavy-duty overalls and eye/face protection when applying the product. In the event of eye contact – immediately irrigate with plenty of clean water. Seek medical attention immediately.

In the event of skin contact – remove contaminated clothing, taking care not to further contaminate the affected area, wash with copious amounts of water.

Ingestion – while confined to mouth, give large quantities of water as mouthwash, ensure mouthwash is not swallowed. If swallowed, give copious amounts of water or milk. Do not induce vomiting.

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Use during pregnancy, lactation or lay

Not applicable.

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Interactions

None known.

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Overdose

As the dose is not specific, any excess of paste applied should be removed with a damp cloth.

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Special warnings

Do not use on calves over 7 days old. Keep cow away from calf for ½ hour. For external use only.

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Withdrawal period

Meat – zero days.

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Incompatibilities

None known.

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Immediate packaging

Aqueous paste contained in 39 ml polypropylene securitainer with tamper evident polyethylene lid, containing either 25g or 40g of Hornex.

Hornex is applied to the horn buds using a flat wooden spatula, 90 mm x 7 mm.

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Storage

Do not store above 25 oC.

Do not freeze.

Protect from direct sunlight.

Replace cap tightly after use.

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Shelf life

Shelf life of the veterinary medicinal product as packaged for sale: 3 years.

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Disposal of unused product

Any unused veterinary medicinal product or waste materials derived from such veterinary medicinal products should be disposed of in accordance with local requirements.

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Additional information

Vm 36237/5000

9 DATE OF FIRST AUTHORISATION

8 December 1993

10 DATE OF REVISION OF THE TEXT

November 2025

Gavin Hall Approved: 21 November 2025

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Registration holder

Gibraltar (UK) Ltd

Animal House

Boundary Road

Lytham

Lancashire

FY8 5LT

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