What Aureo S 700 Treats: Main Uses and Benefits

Aureo S 700 provides antibacterial support and is relevant for managing conditions characterized by acute or disruptive episodes in beef cattle. The medication is applied across domains where additional symptomatic support is needed, primarily addressing bacterial components of Bovine Respiratory Disease (BRD) and Shipping Fever.

It is commonly used when symptoms related to systemic imbalance and respiratory distress intensify, such as fever, coughing, nasal discharge, and reduced appetite. The primary benefit is to aid in the crucial maintenance of weight gains during periods of high clinical challenge, providing support that helps the animals cope more steadily with the difficult episode. This makes the product particularly relevant for high-stress patient groups like newly arrived cattle and weaned calves in feedlot settings.

“The intervention may assist with managing the functional strain associated with acute infection.”

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Quick Fact: Support for Respiratory Symptoms
Supports the animal during periods where acute bacterial infection leads to symptoms that create noticeable physiological strain.

Who Can and Cannot Use Aureo S 700?

Aureo S 700, a combination of chlortetracycline and sulfamethazine, is strictly a Veterinary Feed Directive (VFD) drug and is not approved for human use. Official regulatory information defines eligibility based on species, developmental stage, and legal authorization.

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Contraindicated and Restricted Populations

Classification	Population/Condition
Prohibited (Contraindicated)	Humans (Explicitly labeled as Not for human use).
Prohibited (Contraindicated)	Calves intended for veal processing.
Restricted Use	Beef cattle (steers and heifers) only.
Use Not Established	Pre-ruminating calves (A withdrawal period has not been established).

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Eligibility Requirements

Use of this product is restricted by federal law to by or on the order of a licensed veterinarian. A valid Veterinary Feed Directive (VFD) is mandatory to obtain and administer the medicated feed. Furthermore, all eligible cattle must observe a mandatory 7-day withdrawal period prior to slaughter to comply with established food safety regulations. Use in a manner other than directed on the labeling is strictly prohibited.

Interactions with other medicines and products

Regulatory documentation for the active components of Aureo S 700 (Chlortetracycline and Sulfamethazine) specifies several interaction patterns with other medicines and products. All reported interactions are based on official findings from government health authorities.

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Documented Interaction Patterns

The interaction profile is divided into three official classifications: pharmacokinetic interference, metabolic enhancement, and restricted combinations.

• Pharmacokinetic Interference: The Chlortetracycline component's absorption is significantly impaired by divalent and trivalent cations. This interaction requires a separation of administration timing when the product is co-administered with Antacids, Iron-containing preparations, or foods high in Calcium (like dairy products) to prevent reduced systemic exposure.
• Metabolic and Pharmacodynamic Enhancement: The Sulfamethazine component, a sulfonamide, can act as a metabolic inhibitor, leading to an enhanced exposure and pharmacologic effect of co-administered drugs like Warfarin and Phenytoin. This outcome is documented to require caution and adjustment for patients on Anticoagulant Therapy.
• Officially Restricted Combinations: Co-administration with specific agents is officially restricted or advised against. These restricted combinations include Methoxyflurane, due to the documented risk of fatal renal toxicity, and Isotretinoin (or related retinoids), due to the established risk of Intracranial Hypertension.

How Aureo S 700 Works

Aureo S 700 functions through a dual-target bacteriostatic mechanism, selectively blocking two independent metabolic processes necessary for bacterial growth and proliferation.

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Inhibiting Bacterial Protein Synthesis

This mechanism is driven by the Chlortetracycline component, which physically binds to the bacterial 30S ribosomal subunit. By occupying this crucial site, the molecule prevents transfer RNA (tRNA) from attaching and adding amino acids, thereby halting the synthesis of essential structural and functional proteins. This molecular action immediately inhibits the bacterium's capacity for growth and repair.

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Blocking Nucleic Acid Precursor Production

The Sulfamethazine component employs an antimetabolite mechanism, acting as a false substrate that competitively inhibits the bacterial enzyme Dihydropteroate Synthase (DHPS). This blockade stops the initial step in the synthesis of folic acid, an essential cofactor required for the production of purine and thymidine—the building blocks of bacterial DNA and RNA.

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Dual-Target Synergy and Physiological Effect

The strategic combination of protein synthesis inhibition and nucleic acid precursor blockade results in a pronounced, non-overlapping disruption of the bacterial cell. This synergy results in a bacteriostatic effect by halting the proliferation of susceptible organisms. This reduction in the bacterial population density is the core physiological consequence of the drug's mechanism.

Aureo S 700 is an approved combination antimicrobial that is administered according to specified procedures and timelines. The product is a Type A Medicated Article, a concentrated granular form containing 35 grams of Chlortetracycline and 35 grams of Sulfamethazine per pound, intended solely for the oral administration to beef cattle via medicated feed.

Official Administration Requirements

Procedural Element	Official Mandate
Route of Administration	Oral, via consumption of compounded feed.
Required Dose	Must provide 350 milligrams (mg) of each active ingredient (Chlortetracycline and Sulfamethazine) per head per day.
Treatment Duration	The medicated feed must be administered continuously for a fixed period of 28 days.
Administration Control	Federal law restricts its use; a Veterinary Feed Directive (VFD) must be obtained from a licensed veterinarian prior to administration.

Population and Timing Constraints

Use is specifically approved only for beef cattle. This product is prohibited for use in pre-ruminating calves or calves intended for veal processing. A mandatory 7-day withdrawal period must be observed following the last day of administration before the animals are processed for slaughter. This requirement is a constraint tied to administration timing.

Research Evidence / Overview of Studies

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Summary of Research Focus

Studies investigated the relationship between the drug's administration and changes in reported pain levels among individuals with post-herpetic neuralgia (PHN).

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Post-Herpetic Neuralgia (PHN) Studies

The largest body of evidence focuses on the management of PHN. Meta-analyses evaluated the findings of large-scale randomized controlled trials (RCTs) comparing the drug and placebo. These studies typically administered the drug at various dose levels against an inactive placebo over periods ranging from 4 to 16 weeks.

Key studies reported differences in the trajectory and magnitude of change in average daily pain scores among participants receiving the drug. Furthermore, studies have investigated the safety profile for long-term use and evaluated the time points at which changes in pain scores were noted in the research. The most frequently reported adverse events in trials were dizziness, somnolence, and peripheral edema, and the frequency was generally dose-dependent.

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Exploratory Research in Other Conditions

While the drug is primarily studied for PHN, emerging research has explored its use in chronic low back pain. One pilot study evaluated its combination with a standard non-steroidal anti-inflammatory drug (NSAID) in a small cohort of patients with mixed results. The studies reviewed evaluated whether the combination was associated with a change in mobility scores and whether it correlated with a reduced need for rescue medication. Evidence remains limited regarding the long-term outcomes and results of comparisons for this indication.

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Safety and Tolerability Profiles

Comprehensive reviews have been conducted on the drug's tolerability, focusing on studies up to one year in duration. Reviews of studies report that withdrawal rates due to adverse events are low to moderate and tend to be dose-dependent. The most common reasons for discontinuation were dizziness and fatigue.

In conclusion, the research results reported differences between the drug and placebo in studies evaluating the management of PHN. Further research is necessary to explore the potential role of the drug in other pain conditions.

Common questions about Aureo S 700 (FAQ)

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Q: What is the condition referred to as 'shipping fever' that the drug addresses?

The drug is indicated for use in the presence of respiratory disease such as shipping fever. According to industry interpretation of the regulatory indication, this is generally described as a respiratory disease complex common in newly arrived cattle. It often develops after periods of high stress, such as weaning or transport.

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Q: What are the potential common side effects of Aureo S 700?

Regulatory documents on the active ingredients indicate that the most common adverse effects reported involve digestive disturbances. These may include reactions such as diarrhea, nausea, and vomiting. It is important to review the full safety information provided with the product.

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Q: Can using Aureo S 700 cause sensitivity to sunlight?

Yes, official information confirms that photosensitivity (increased skin reaction to sunlight) is a documented risk associated with the tetracycline component. In rare instances, exposure to sunlight following contact with the product may result in skin reactions.

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Q: Are there any known issues with giving Aureo S 700 to pre-ruminating calves?

The product is prohibited for use in pre-ruminating calves because official documents state that a withdrawal period has not been established for them. Furthermore, the active ingredients carry safety warnings that include the potential to affect bone and tooth mineralization in growing or young animals.

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Q: Are there any known long-term side effects associated with the active ingredients?

Official safety information cautions against long-term use primarily due to the documented risk of increasing bacterial resistance. Chronic exposure to the active ingredients has been associated with health concerns such as potential kidney toxicity and liver conditions.

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Q: Does Aureo S 700 interact with other feed supplements or minerals?

Yes, regulatory documents state that the absorption of the Chlortetracycline component is significantly impaired by divalent and trivalent cations. Official documents describe that separation of administration timing may be necessary when the product is co-administered with supplements or feed components that are high in minerals like Calcium or Iron.

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Q: Can breeding animals be given Aureo S 700?

Official product labeling is silent regarding the use of Aureo S 700 specifically in breeding animals. However, a general safety warning for the product notes that it May damage the unborn child, which is classified as a reproductive toxicity concern.

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Q: Does the medication affect the gut bacteria?

As an antimicrobial agent, the medication's function is to inhibit bacterial growth. Authoritative research indicates that when used at therapeutic concentrations, the drug is expected to modulate or affect the intestinal microbiota (gut bacteria) in the cattle.

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Q: Are there any warnings about handling the product dust?

Yes, the official safety documents classify the product as Combustible Dust, warning of a physical hazard. Official safety information includes warnings to avoid inhalation and suggests the use of appropriate protective equipment in poorly ventilated spaces during mixing.

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Q: What is the meaning of the number '700' in the name?

The number 700 on the label is linked to the common drug level used in the manufacturing of medicated feed. It often represents the concentration of active ingredients, with 700 grams of the combined drug typically included per ton of finished feed to meet established concentration guidelines for the final medicated feed.

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Q: What are the inactive ingredients in Aureo S 700?

According to the official product labeling, the inactive ingredients in the Type A Medicated Article form include Calcium sulfate and dried Streptomyces aureofaciens fermentation product.

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Q: Is it normal to see changes in appetite when administering Aureo S 700?

Changes in appetite are not listed directly as a common side effect in regulatory documents. However, common adverse effects on the gastrointestinal system include nausea and vomiting; such effects are associated with the gastrointestinal system.

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Q: What is the difference between a Type A Medicated Article and a Type B Medicated Feed?

A Type A Medicated Article is the most concentrated form of the drug and is never fed directly to animals. In contrast, a Type B Medicated Feed is less concentrated than Type A and is used as an intermediate to make Type C feed, but it is also never fed directly.

Official Storage and Disposal Requirements

Official regulatory documents define strict conditions for the storage and disposal of Aureo S 700.

Storage Conditions

Requirement	Description
Temperature and Environment	Store in a cool, dry, and well-ventilated place, typically at room temperature (e.g., 5 C to 25 C), away from direct sunlight.
Security and Access	The product must be stored locked up and kept out of the reach of children (P405 statement).
Physical Hazard	Keep away from heat, sparks, open flames, and other ignition sources due to its classification as a Combustible Dust. Containers must be kept tightly closed.

Disposal Rules

For disposal, contents and containers must be managed in accordance with all local, regional, and national regulations (P501 statement). It is officially required to avoid discharge into drains, water courses, or onto the ground to prevent environmental contamination.