Description

LA 300 Oxytetracycline Injection: Comprehensive Guide for Cattle & Horses

LA 300 (also marketed as Noromycin 300 LA) delivers 300 mg/mL of oxytetracycline in a long‑acting injectable form. Veterinarians rely on its broad‑spectrum activity to treat—and control—bacterial diseases in cattle, swine, and, off‑label, some equine conditions.

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What Is LA 300?

Developed by Norbrook, LA 300 provides a sterile, ready‑to‑use solution of oxytetracycline hydrochloride. Its long‑acting formulation maintains therapeutic blood levels for up to 72 hours, making it ideal for:

• Bacterial pneumonia & shipping fever

• Foot rot & diphtheria

• Acute metritis & wooden tongue

• Bacterial enteritis (scours)

• Pinkeye (infectious bovine keratoconjunctivitis)

• Leptospirosis

LA 300 Indications and Spectrum of Activity

This solution acts against a wide variety of Gram‑positive and Gram‑negative pathogens. In beef and non‑lactating dairy cattle—as well as calves and swine—it effectively treats:

• Respiratory tract infections

• Clostridial diseases

• Skin and wound infections

• Reproductive tract infections

• Urinary tract infections

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Dosage & Administration Of LA 300

Standard Cattle & Swine Dosing

• Cattle: 3 mL per 100 lb body weight, deep IM or SC

• Swine: 3 mL per 100 lb body weight, deep IM

• Maximum per site: 10 mL in cattle; 5 mL in swine to minimize tissue irritation

Withdrawal Time: 28 days for meat. Not approved for lactating dairy animals.

Off‑Label Equine Use

Although not FDA‑labeled for horses, practitioners sometimes use LA 300 extralabel for equine bacterial pneumonia or strangles complications. Consult your veterinarian for proper dosing and withdrawal recommendations.

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Administration Tips & Best Practices

1. Shake gently before use to ensure uniform suspension.

2. Rotate injection sites (neck, shoulder) to reduce irritation.

3. Use sterile technique—replace needle after each 10 mL—to prevent abscess formation.

4. Store between 2–25 °C, protect from light.

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Warnings & Precautions

• Do not use in lactating dairy cattle.

• Observe local regulations on antibiotic use and withdrawal.

• Monitor injection sites for swelling or pain.

• Discard any unused solution after manufacturer’s recommended period.

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Frequently Asked Questions (FAQs)

What is LA 300 used for?
This solution treats respiratory, enteric, musculoskeletal, and reproductive infections caused by susceptible bacteria in cattle and swine.

How much can be used for cattle?
Administer 3 mL per 100 lb body weight via deep IM or SC, up to 10 mL per site.

Can LA 300 be used in horses?
Veterinarians may prescribe this off‑label for equine pneumonia or wound infections; however, follow strict veterinary guidance on dosing and meat/milk withdrawal.

Does Oxytetracycline Injection need refrigeration?
Store at 2–25 °C; do not freeze. Keep vial tightly closed and protected from direct sunlight.

How long does LA  300 remain effective?
Its long‑acting formula maintains therapeutic levels for up to 72 hours, reducing the need for repeat dosing.

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Explore More Equine & Livestock Health Solutions

• For antibiotics and supportive care products, visit our Shop and browse tried‑and‑true formulations.

• Discover new arrivals in our Horse Care & New Treatments section—carefully curated for modern equine management.

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Safety and Compliance
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For additional details, please visit P65 Warnings. https://www.p65warnings.ca.gov/businesses/new-proposition-65-warnings