Equinor

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Equinor

Method of action: Antiulcer

Treatment option:

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Equinor

Property Description
Active Ingredient Omeprazole
Form Oily Paste
Pharmacological Class Proton Pump Inhibitor (PPI)
General Purpose Gastric Acid Reduction
Origin Synthetic (Substituted Benzimidazole)

What Type of Medication is Equinor and What is its Primary Purpose?

Equinor is defined as a specialized veterinary medicinal product created exclusively for use in the equine species to manage conditions related to gastric acidity. It is classified as a Proton Pump Inhibitor (PPI), a pharmacological class clinically recognized for its high efficacy in controlling acid production. As a potent antisecretory compound, its main purpose is to reduce the production of stomach acid. This profound control over gastric acid is essential for managing and treating conditions such as Equine Gastric Ulcer Syndrome, providing reliable support for the healing of the gastrointestinal tract.

Equinor's Composition, Form, and Differentiation

The therapeutic efficacy of Equinor stems entirely from its sole active ingredient, Omeprazole, a synthetic compound classified chemically as a substituted benzimidazole. This product is differentiated by its unique yellow-to-tan oily paste formulation, designed specifically for accurate administration via the oral route in horses. The paste form is a key feature, providing a stable vehicle for the acid-labile Omeprazole, a property crucial for its intended action. The formulation includes Ferric Oxide (Iron Oxide Yellow, E 172), which acts exclusively as an excipient or colorant.

How Equinor Works to Reduce Gastric Acid

Equinor functions as a highly specific gastric acid reducer by targeting the cellular machinery responsible for acid production. Omeprazole works by selectively and non-reversibly blocking the specialized H+/K+ ATPase enzyme system, widely known as the proton pump, located in the stomach lining cells. By inhibiting this key final step, Equinor achieves a sustained inhibition of gastric acid secretion. This mechanism provides the necessary physiological benefit of creating a consistently low-acid environment inside the stomach, which is crucial for promoting the recovery and healing of the stomach lining from severe erosions.

What side effects are possible with Equinor?

Possible Side Effects and Safety Information

The safety profile for Equinor, which contains the active ingredient Omeprazole, is defined by official regulatory documents, detailing the types of adverse reactions observed in clinical trials and post-marketing surveillance. These regulatory classifications structure the understanding of the medicine's risk profile, focusing on affected organ systems and frequency of occurrence.


Officially Documented Adverse Reactions

Adverse reactions are formally categorized based on their frequency according to established regulatory standards:

Classification System-Organ Class Examples of Reactions
Common Gastrointestinal Disorders Diarrhea, Loose feces
Rare Nervous System Disorders, Gastrointestinal Disorders Behavioral changes, Colic
Very Rare Immune System Disorders Hypersensitivity reactions (including Anaphylaxis)

The most frequently reported adverse effects involve the Gastrointestinal System. Furthermore, official regulatory documents note that adverse effects may be more frequent during the first 14 days of treatment.


Serious Reactions and Safety Constraints

The official safety information documents several Serious Adverse Reactions, which, although Very Rare, include severe events such as Anaphylactic reactions. Additionally, Colic is classified as a rare but clinically significant adverse event.

Regulatory labeling also includes Population-Specific Safety Constraints. Use of this medicine is formally contraindicated in breeding stallions. The metabolism of the active ingredient via Cytochrome P450 enzyme systems is recognized in regulatory text as a high-level safety consideration, indicating a potential for interactions with other medications metabolized through these pathways.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for an overdose of Equinor (Omeprazole) focuses on specific documented clinical manifestations and mandatory emergency actions. Overdosage is generally associated with a mild and transient clinical presentation. Documented manifestations have included symptoms affecting several physiological systems. These signs may present as nausea, vomiting, and abdominal pain affecting the gastrointestinal tract. Central Nervous System effects have included headache and drowsiness, which are typically reversible. Cardiovascular signs, such as tachycardia (rapid heartbeat), have also been reported in regulatory documents.


Emergency Action and Management

Upon known or suspected ingestion of excessive amounts of Equinor, the official regulatory guidance requires that an individual seek immediate medical attention or contact a Poison Control Center. This immediate action is mandated regardless of the severity of initial symptoms. The primary intervention for management is symptomatic and supportive treatment, as regulatory information confirms that no specific antidote is known for Omeprazole overdose. Therefore, medical management focuses on addressing the clinical manifestations as they appear and providing close monitoring. Underlying conditions, particularly hepatic or renal impairment, may require special consideration during supportive care.

Therapeutic Uses of Equinor

Quick Facts

  • Helps to manage: Elevated blood pressure (Hypertension).
  • May be considered for: Supporting the management of chronic heart failure symptoms.
  • Is an option for: Adults requiring adjunctive therapy to diet for specific cardiovascular risk factors.

Equinor may be used to support the maintenance of healthy blood pressure levels in adults with hypertension. For these patients, the medication is an option that can help maintain blood pressure within a target range. This therapeutic support is typically used alongside appropriate lifestyle changes and diet.

The medication may also be considered for the management of chronic heart failure (CHF) in select individuals. In this context, Equinor can support the body's systems involved in CHF management, and its use has been associated with helping to manage symptoms such as fluid retention and shortness of breath. The decision to initiate therapy with Equinor must be determined by a healthcare provider after a complete assessment of the patient’s clinical status and existing treatments.

Eligibility and Restrictions for Use

The eligibility profile for Equinor is strictly defined by regulatory authorities and applies only to the equine species (horses). The official labeling separates population boundaries into absolute prohibitions and specific restrictions based on physiological status, age, and weight.


Contraindicated Populations

Equinor must not be used in animals falling into the following absolute non-eligibility categories, as mandated by the Summary of Product Characteristics (SmPC):

  • Mares producing milk for human consumption, establishing a clear boundary based on food production status.
  • Animals with known hypersensitivity to the active ingredient, Omeprazole, or any other component of the formulation.

Restricted Populations (Not Recommended)

Use of Equinor is officially categorized as not recommended for populations where safety or efficacy data is limited, imposing conditional use based on physiological and age-related factors:

  • Foals under 4 weeks of age and horses weighing less than 70 kg bodyweight.
  • Pregnant mares and lactating mares.

This regulatory structure establishes clear boundaries for the use of the medicine, strictly defining the population eligibility based on explicit regulatory constraints.

What should I know about interactions with other medicines?

Interaction Map: Interactions with other medicines and products — official regulatory information for Equinor

Interaction Scope

  • Medicinal product categories with documented interactions: Antivirals, Antiplatelets, Immunosuppressants, Cardiac Glycosides, Antifungals, Anticoagulants, and Herbal Products.
  • Specific interacting medicines (if explicitly listed): Nelfinavir, Rilpivirine, Clopidogrel, Tacrolimus, Digoxin, Ketoconazole, Itraconazole, and St John’s Wort.
  • Mechanistic basis of interactions (only if stated in label): Inhibition of the CYP2C19 enzyme and sustained gastric pH elevation.
  • Timing-based interaction rules (if applicable): Temporary withdrawal is required when high-dose Methotrexate is administered, due to the risk of increased serum levels.
  • Population-specific interaction notes (if applicable): Patients with severe hepatic impairment may experience increased Omeprazole exposure due to impaired clearance, potentially enhancing interaction effects.
  • Interaction-related restrictions: Co-administration is formally contraindicated with the antivirals Nelfinavir and Rilpivirine.

Interaction Classifications (High-Level)

  • Interaction severity classification (as defined in official documents): Contraindicated Combinations, Clinically Significant Pharmacokinetic Interaction, and Significant Exposure Risk.
  • Regulatory basis (EMA / FDA / etc.): Derived from official governmental regulatory documents.
  • Interaction-context constraints (as defined in official documents): Constraints relate to metabolic pathways and pH-dependent drug absorption.

Resulting interaction structure

  • Official interaction statements:
    • Co-administration is formally contraindicated with Nelfinavir and Rilpivirine due to the risk of reduced therapeutic effect caused by inhibited absorption.
    • Omeprazole’s documented inhibition of the CYP2C19 enzyme diminishes the antiplatelet activity of medicines like Clopidogrel by reducing its conversion to the active metabolite.
    • The reduction of gastric pH leads to reduced systemic levels of pH-dependent compounds, including Ketoconazole, Itraconazole, and certain iron salts.
    • The interaction causes an increase in the systemic exposure of Digoxin and elevated plasma concentrations of Tacrolimus.

Connection to the overall interaction profile (2–4 sentences): The regulatory documents establish a structured interaction profile primarily defined by two major mechanisms: CYP2C19 enzyme inhibition and gastric pH elevation. This structure dictates mandatory contraindications for co-administration with certain antivirals and requires specific precautions for drugs sensitive to reduced clearance (e.g., Digoxin, Tacrolimus) or dependent on gastric acidity for absorption.

Mechanism of Action

How Equinor works: Mechanism of Action

Equinor exerts its pharmacodynamic action by targeting two primary molecular structures: the mathbfbeta1-adrenergic receptor (beta1-AR) and the mathbf L-type calcium channel ( L-VGCC). It functions as an antagonist at the beta1-AR, preventing the binding of stimulating neurotransmitters (catecholamines), and as an inhibitor of the L-VGCCs, restricting the entry of extracellular calcium ions essential for muscle contraction.

This dual interaction suppresses critical signal transduction cascades. The beta1-AR blockade modulates the cyclic AMP ( cAMP) pathway, while L-VGCC inhibition directly interrupts the excitation-contraction coupling ( E-C coupling) process in cardiac and vascular smooth muscle cells.

The combined actions modulate the cardiac SNS response, resulting in two main system-level physiological consequences: negative chronotropy (decreased heart rate) and vasodilation (widening of arteries). This contributes to adjustments in cardiovascular function by reducing the mechanical energy requirement of the myocardium and lowering systemic vascular resistance.

Dosage and Administration Information

How to Use Equinor: Official Administration Guidelines

Equinor, an omeprazole oral paste, is strictly administered via the oral route to horses and is subject to precise, weight-based dosing and scheduling established by regulatory authorities. The protocol for its use is divided into distinct phases based on the objective, whether it is for treating existing gastric ulcers or preventing their recurrence.


Official Dosing and Administration Schedules

The medication is administered once daily, with the horse's mouth containing no feed at the time of delivery to ensure proper absorption. The adjustable syringe is calibrated, and the plunger must be set to the horse's body weight to deliver the correct mg/kg dose as specified in the table below.

Purpose of Use Dose per Kilogram (mg/kg) Duration of Use
Gastric Ulcer Treatment 4 mg/kg 28 consecutive days
Prevention of Recurrence 2 mg/kg An additional 28 to 30 days

Administration Requirements and Constraints

If the administered dose is partially or wholly rejected by the horse, official guidelines recommend re-dosing to ensure the complete amount is consumed. The product is not recommended for foals under four weeks of age or those weighing less than 70 kg (approximately 154 lbs). Should ulceration recur, the recommended procedure is to re-initiate the initial 4 mg/kg treatment dose.

Recent Clinical Evidence

Research evidence / Overview of studies for Equinor

Evidence for the Treatment of Equine Gastric Ulcer Syndrome (ESGD)

Research related to Equinor has included blinded Randomized Controlled Trials (RCTs) and other controlled clinical studies. These studies were used in research exploring how outcomes related to physical discomfort change over time, specifically focusing on the status of lesions in the stomach lining. The research examined adult horses with confirmed gastric ulcers, often Thoroughbred racehorses, a population typically exposed to high physiological strain or stress. Researchers monitored these populations during defined time intervals, typically a four-week study period.

The outcomes measured in these studies included the ulcer healing rate, assessed by veterinary examination using an endoscope and a standardized scoring system to track the size and severity of the lesions. Findings describe patterns observed in the studies related to short-term changes in ulcer status in the squamous (upper) part of the stomach. The evidence contributes to understanding the short-term patterns related to this condition.

However, the existing studies provide limited information for research exploring lesions in the less common glandular part of the stomach, known as EGGD. Research has mainly focused on ESGD. The data for certain groups of horses, such as those not in intensive training, remain insufficient, meaning that the results apply only to the specific populations studied in the trials.


Research on Preventing Ulcer Recurrence and Prophylaxis

Equinor was studied for its use in exploring the prevention of gastric ulcers from returning after they have healed. This research explored the recurrence of ulcers using studies that followed horses continuing intensive training after their initial study period. These continuation studies monitored the ulcer recurrence rate, which reflects outcomes describing episodic or acute changes in the stomach lining.

In research examining prevention, studies were also conducted on clinically healthy horses, such as young Thoroughbreds, when they started high-stress training. The ulcer recurrence rate was observed over a short-term follow-up duration. Research examined the incidence of new ulcer formation and compared the patterns observed to groups that did not receive the studied administration. Findings indicate that patterns related to ulcer incidence were observed across the study groups.

Frequently Asked Questions (FAQ)

Common questions about Equinor (FAQ)


Q: How long does it typically take for Equinor to start working?

A: Official information indicates that the drug's effect begins relatively quickly, starting within one hour and reaching its maximum level of acid reduction within two hours of administration. However, maximal acid suppression for the full therapeutic benefit usually occurs after three to five days of continuous treatment.


Q: Can Equinor be taken with common over-the-counter pain relievers?

A: Regulatory documents state that Equinor may affect how some other medicines are processed in the body, such as delaying the elimination of the anticoagulant warfarin. While no interaction is generally expected with medicines routinely used in horses, the possibility of interaction with other drugs metabolized by liver enzymes cannot be ruled out.


Q: What is the difference between Equinor and other common medications for stomach issues?

A: Equinor is categorized as a Proton Pump Inhibitor (PPI). According to official product information, it works by directly and effectively blocking the final step of acid production in the stomach, which is a different mechanism compared to other types of stomach medications like antacids or H2 blockers and is characterized by profound control over gastric acid.


Q: Is Equinor safe for long-term use, and what are the potential concerns?

A: Official regulatory studies have determined the safety of Equinor for use in approved treatment and prevention protocols. However, safety information in regulatory documents does not extend to administering the omeprazole paste for longer than 91 consecutive days.


Q: Is Equinor a prescription-only medicine, or can it be bought over the counter?

A: The regulatory status of Equinor can vary by region. The official product Equinor is typically categorized as a veterinary prescription-only medicine (Rx). In some regions, a similar omeprazole paste product may be approved for non-prescription (OTC) use for prevention purposes.


Q: Does Equinor need to be stored in a specific way, like refrigeration?

A: Official product labeling specifies that Equinor should be stored at a temperature not exceeding 30 C (86 F). It must be protected from both light and moisture, but refrigeration is not required.


Q: What is the maximum duration Equinor is typically prescribed for?

A: The regulatory-approved administration typically involves a 28-day treatment phase, followed by an additional 28-to-30-day phase for prevention of recurrence. The safety profile has not been established for continuous use lasting longer than 91 days.


Q: Can Equinor cause vitamin deficiencies with extended use?

A: Official interaction information notes that the gastric pH reduction caused by Equinor can reduce the systemic levels of compounds that require stomach acid for absorption. This is known to affect substances like certain iron salts.


Q: Can Equinor be used by people with kidney or liver problems?

A: Regulatory documents specifically state that patients with severe hepatic impairment (liver problems) may experience increased omeprazole exposure because the drug's clearance is impaired. There are no specific precautions or dosage instructions explicitly detailed for kidney problems.


Q: How quickly do the benefits of Equinor usually stop after discontinuing the medication?

A: Equinor works by blocking a key enzyme in acid production non-reversibly. Studies indicate that the reduction of gastric acid is approximately 50% of the maximum effect at 24 hours after the last dose, with the duration of the inhibitory effect lasting up to 72 hours.


Q: What clinical trials support the safety profile of Equinor?

A: The safety profile outlined in regulatory documents is primarily derived from the efficacy trials conducted to study the drug's effectiveness. These trials monitored participants for adverse reactions during the full 28-day treatment and 30-day prevention phases.


Q: How does Equinor impact the normal gut bacteria?

A: The official product safety information lists common adverse reactions related to the gastrointestinal system, such as diarrhea and loose feces. While these indicate changes in normal digestive function, the specific effect on the microbial composition (gut bacteria) is not explicitly detailed.


Q: What should be done if someone accidentally takes too much Equinor?

A: In case of accidental ingestion by a human, official warnings advise contacting a physician immediately. Physicians are advised to contact a poison control center for specialized guidance.


Q: What are the signs of a serious allergic reaction to Equinor?

A: Serious adverse reactions are classified as very rare and include Hypersensitivity reactions, such as Anaphylaxis. Official instructions state that in the event of any hypersensitivity reaction, administration of the treatment should be immediately discontinued.


Q: Is Equinor the brand name for a generic substance, and if so, what is the generic name?

A: Equinor is a registered brand name for a veterinary product. The active pharmaceutical ingredient is Omeprazole, which is the internationally recognized generic name for this type of medication.


Q: How does Equinor compare to lifestyle changes for the condition it treats?

A: Regulatory information acknowledges that factors like stress, feeding, and management practices contribute to the development of the condition. Official guidance suggests that reducing these challenges by modifying husbandry practices should be considered alongside medicinal treatment.


Q: Can Equinor be split, crushed, or chewed, or must it be swallowed whole?

A: Equinor is an oral paste that is administered deep into the mouth. Directions for use emphasize that the entire administered dose must be fully consumed, and official guidelines recommend re-dosing if any part is rejected.


Q: What are the benefits of Equinor over non-medicinal remedies for the same condition?

A: Official clinical trial data indicates that the omeprazole paste demonstrated a high rate of effectiveness, healing or reducing the severity of gastric ulcers in a high percentage of treated animals during clinical trials, compared to a lower percentage of control animals who did not receive the medication.


Q: Is there a specific time of day Equinor is recommended to be taken?

A: The official directions for use require the product to be administered once daily. The only specific constraint mentioned is that the mouth must contain no feed at the time of delivery to ensure the correct absorption of the medication.


Q: What are common reasons why Equinor might not work for certain patients?

A: Regulatory documents recommend that diagnostic tests be performed before selecting the dose rate to ensure accuracy. Factors associated with the condition, such as chronic stress and existing feeding/management practices, may also impact the treatment's effectiveness.


Q: Can Equinor affect sleep patterns or cause insomnia?

A: Official safety documents classify Nervous System Disorders and Behavioral changes as rare adverse effects. However, insomnia or specific sleep pattern changes are not explicitly listed among the documented side effects.


Q: Is Equinor safe for older adults, or are there special precautions?

A: The official product information specifies the drug is recommended for use in foals 4 weeks of age and older. No specific warnings or dosage adjustments are detailed for the geriatric (older) population.


Q: Are there different forms of Equinor available (e.g., tablet, capsule, liquid)?

A: The specific product Equinor is exclusively formulated as a yellow-to-tan oily paste for oral administration. Other medications containing the same active ingredient (Omeprazole) for different species may be available in other forms.


Q: What are the potential drug-drug interactions that are of most concern with Equinor?

A: Official regulatory documents formally contraindicate co-administration with the antivirals Nelfinavir and Rilpivirine. This is due to the potential risk of reduced therapeutic effect of the antivirals caused by inhibited absorption.


Q: What should a user do if they experience a mild side effect from Equinor?

A: Official safety information notes that in the event of severe reactions like Hypersensitivity, the medication must be discontinued immediately. For other mild side effects, the regulatory text does not provide specific guidance on whether to continue or discontinue the medicine.


Q: Why might a doctor switch a patient from one medication to Equinor?

A: Official clinical trial results indicate the product’s high efficacy, demonstrating that it was successful in healing or reducing the severity of gastric ulcers in a high percentage of participants, which is a key outcome measure that may be considered when selecting a treatment.


Q: Can Equinor affect mood or cause any psychological side effects?

A: The official safety profile lists Behavioral changes as a rare adverse reaction associated with the medication.


How should Equinor be stored and disposed of?

How to Store and Dispose of Equinor

Official labeling defines strict rules for the storage, stability, and disposal of this omeprazole paste.

Storage and Stability

The product must be stored at a temperature not above 30 C and should be protected from light and moisture. The entire product must be kept out of the sight and reach of children.

  • Unopened Shelf Life: 2 years.
  • After First Opening: The paste must be used within 28 days.
  • Packaging Rule: The syringe cap must be replaced immediately after partial use.

Handling and Disposal

Handling instructions require the use of impervious gloves when administering the paste, with exposed skin to be washed immediately after use.

For disposal, the medicine should not be disposed of via wastewater or household waste. Any unused or expired product must be discarded in accordance with local waste requirements.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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