At the core of Orbenin 16.67% Ophthalmic Eye Ointment (12 pack) is the active ingredient Cloxacillin, present as Cloxacillin Benzathine. Cloxacillin is a narrow-spectrum antibiotic belonging to the penicillin group. Its primary strength lies in its ability to resist the enzyme beta-lactamase, which is produced by many bacteria to neutralize penicillin-type drugs.

By utilizing the benzathine salt form, the ointment ensures a sustained release of the antibiotic. This is crucial for eye treatments, as the natural tearing process and blinking of the animal tend to wash away medications quickly. The 16.67% concentration provides a potent dose directly to the site of infection, ensuring that the bacteria are inhibited or destroyed efficiently.

Clinical Indications: When to Use Orbenin

1. Infectious Bovine Keratoconjunctivitis (IBK/Pinkeye): Caused primarily by Moraxella bovis, this is a highly contagious disease. It leads to inflammation of the conjunctiva, corneal edema, and, in severe cases, ulceration and permanent blindness.
2. Ophthalmia in Sheep: Similar to pinkeye in cattle, sheep can suffer from contagious ophthalmia (often caused by Mycoplasma conjunctivae or Chlamydia species), where Orbenin serves as an effective topical intervention.
3. General Bacterial Infections: It is effective against a range of Gram-positive bacteria, including Staphylococci (including penicillin-resistant strains) and Bacillus species, which may complicate eye injuries or irritations.

The Significance of the 12 Pack

• Herd Management: When an outbreak of Pinkeye occurs in a herd, it rarely stays confined to a single animal. Having a 12-pack ensures that the producer has enough supply to treat multiple animals immediately, preventing the spread of the pathogen.
• Treatment Course Completion: Each 3g tube is typically designed for a single application or a short course for one animal. Having a pack of 12 ensures that the full course of treatment can be completed without the risk of running out of medication.
• Cost-Effectiveness: Purchasing in bulk (the 12 pack) generally reduces the price per unit, which is a vital consideration for large-scale livestock management where margins are tight.

Application and Dosage Guidelines

Proper administration of Orbenin 16.67% Ophthalmic Eye Ointment (12 pack) is essential to ensure maximum efficacy.

1. Restraint: Ensure the animal is properly restrained. For cattle, a head crush or halter is necessary to prevent sudden movements that could cause the applicator tip to injure the eye.
2. Cleaning: Before application, gently wipe away any crusting or discharge from the eye area using a clean, damp cloth or sterile gauze.
3. Application: Hold the tube vertically. Evert the lower eyelid and squeeze approximately 1/4 to 1/2 of a tube (depending on species and severity) into the lower conjunctival sac.
4. Distribution: Once the ointment is applied, allow the animal to blink. You may gently massage the closed eyelid to help distribute the ointment across the entire surface of the cornea.
5. Frequency: While a single application is often sufficient for mild cases of IBK due to the long-acting nature of Cloxacillin Benzathine, severe cases may require a second application after 48 to 72 hours, as directed by a veterinarian.

Advantages of the Ointment Base

Unlike liquid eye drops, the ointment base of Orbenin 16.67% provides several advantages:

• Longevity: The thick consistency adheres to the moist surface of the eye longer than aqueous solutions.
• Protection: The ointment acts as a physical barrier, providing a soothing layer over irritated tissues and protecting the cornea from environmental irritants like dust and flies.
• Fly Deterrence: By treating the infection and reducing discharge, the ointment helps decrease the attraction of flies, which are the primary vectors for spreading Moraxella bovis between animals.

Safety, Precautions, and Withdrawal Periods

While Orbenin 16.67% Ophthalmic Eye Ointment (12 pack) is highly effective, users must adhere to safety protocols:

• Penicillin Sensitivity: Cloxacillin is a penicillin. It should not be administered to animals with a known hypersensitivity to beta-lactam antibiotics. Furthermore, people with known penicillin allergies should handle the product with extreme caution, wearing gloves to avoid skin contact.
• Withdrawal Periods: One of the major benefits of Orbenin is that, in many jurisdictions, there is a zero-day withdrawal period for both meat and milk in cattle. This means the animal’s products can enter the food chain immediately after treatment, making it an ideal choice for dairy farmers. However, always check the specific label and local regulations as these can vary by region.
• Storage: The tubes should be stored in a cool, dry place, typically below 25°C. Excessive heat can thin the ointment base, potentially affecting the delivery of the active ingredient.