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Ovuplant

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Ovuplant

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Treatment option:

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

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.

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Overview of Ovuplant

Property Description
Active ingredient Deslorelin (as Deslorelin acetate)
Form Implantation Tablet (Solid cylindrical implant)
Pharmacological class GnRH Agonist (Gonadotropin-releasing hormone agonist)
General use Reproductive Management (Timing of ovulation)
Origin Synthetic Nonapeptide Analogue

Ovuplant: Defining the Veterinary Medicinal Product

Ovuplant is a specialized veterinary medicinal product used in the controlled reproductive management of horses (mares). It is employed as a zootechnical treatment, enabling professionals to achieve a specific, timed event within the reproductive cycle with high predictability, a principle clinically recognized for its efficiency in equine breeding programs. The drug's overarching purpose is to provide precise, chemical control over ovulation, facilitating the careful planning of breeding management. This differs from other hormonal products by its specific formulation as a short-term, solid implant, designed for a singular, triggering event.


Composition and Pharmacological Classification of Deslorelin

The core component in Ovuplant is the active ingredient, Deslorelin (acetate), which is classified as a Gonadotropin-releasing hormone (GnRH) agonist. This substance is chemically a synthetic nonapeptide analogue—a manufactured version—of the body’s own naturally occurring GnRH, placing it within the class of Pituitary and hypothalamic hormones and analogues. Deslorelin's superagonist potency is supported by pharmacological studies, confirming its reliable role in initiating the final maturation and release of eggs in female mammals, providing predictable control over the timing of ovulation. This confirms that the substance is effective in intentionally triggering the release of an egg at a predetermined time.


The Ovuplant Dosage Form: Implant Tablet

Ovuplant is formulated as an implantation tablet, which is a small, solid cylindrical implant specifically designed for subcutaneous implantation (beneath the skin). This physical form is a single active ingredient product, containing Deslorelin acetate embedded within a biodegradable matrix made of excipients like hydrogenated vegetable oil. This precise solid formulation is a differentiating factor from standard liquid injectables, as it is engineered for a defined, concentrated release of the hormonal substance over a short period, which is necessary to rapidly initiate the required hormonal cascade.

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What side effects are possible with Ovuplant?

Possible Side Effects and Safety Information: Ovuplant

The safety profile of Ovuplant is based on classifications documented in regulatory sources and is focused on characteristics observed during its approved use in mares. The officially documented adverse events are primarily categorized by the General Disorders and Administration Site Conditions and effects on the Reproductive System and Breast Disorders.


Administration Site Reactions

Adverse events at the implantation site are typically transient and expected. Official product information lists the occurrence of localised swelling, a slight increase in sensitivity to touch, and elevated skin temperature in the immediate area of administration. These reactions are generally temporary, resolving without the need for additional treatment, usually within two to five days. Mild fibrosis at the implantation site has also been documented.


Reproductive System Characteristics

The primary systemic effect observed is an increased dioestrous period, which corresponds to a prolonged interovulatory interval. This characteristic means that some mares may experience a lengthening of the time between the induced ovulation and the subsequent spontaneous ovulation, which is a known consequence following the action of the GnRH agonist. No systemic serious adverse reactions are classified in the core product information for mares; however, the suppression of ovarian activity was observed in toxicology studies at high doses.


Official Safety Constraints

Specific safety limitations are outlined in the official regulatory documents. Use of Ovuplant is contraindicated in pregnant mares due to the recognized risk of foetotoxicity associated with GnRH analogues. It is also contraindicated in mares producing milk for human consumption. Furthermore, the product is not recommended for use in juvenile animals, specifically mares less than three years of age.

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Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory information for Ovuplant (Deslorelin) addresses documented overdose findings in the target animal and the mandated emergency actions for the human administrator.


Documented Overdose Findings

Element Official Regulatory Statement
Documented Overdose Presentation: The only systemic adverse effect observed in mares following the administration of up to ten implants simultaneously in studies was suppression of ovarian activity.
Physiological Systems Affected: Regulatory documents note effects on the ovarian system in mares, and the potential for adverse effects on the male and female reproductive systems in humans following accidental exposure.

Emergency Actions and Help Seeking

Element Official Regulatory Statement
When Immediate Medical Help is Required: Immediate medical assistance must be sought by the person administering the product in the case of accidental self-injection.
Supportive Management: Urgent medical care is required with a view to having the implant removed. The regulator notes that no specific antidote is available for Deslorelin.

Connection to the Overdose Profile The official profile is structured around these two distinct scenarios. For the target animal, overdose findings confirm a specific physiological change (ovarian suppression) without other documented systemic effects. For the human administrator, the regulator explicitly mandates an emergency response (seek medical assistance immediately) due to the serious, documented risk of adverse effects on the reproductive system from accidental exposure, with the procedure of implant removal being the required focus of the medical consultation.

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Therapeutic Uses of Ovuplant

What Ovuplant Treats: Main Uses and Benefits

Ovuplant is applied as a specialized zootechnical tool to manage the final stages of the mare's estrous cycle, primarily addressing symptoms related to systemic imbalance regarding the natural reproductive process. This treatment is relevant for addressing the uncertainty of natural ovulation timing. The implant is relevant in conditions where the induction of ovulation is appropriate. The treatment is relevant for normally cycling mares with an ovarian follicle that has achieved the necessary maturity for induction.

The primary uses are for addressing the uncertainty of ovulation timing and supporting optimized breeding schedules. Its main therapeutic benefit supports high predictability by assisting the mare to ovulate within a targeted window of time, which assists in managing a variable physiological process for a more controlled clinical event.


“This application supports the planning of specialized breeding events, assisting with symptoms that interfere with daily functioning related to cycle management.”


The treatment is relevant in contexts involving the logistical inefficiency of breeding that can arise from intensive monitoring. Ovuplant is relevant in contexts involving equine breeding programs to assist with optimizing reproductive schedules that utilize specialized semen. This application supports the reduction of labor and may assist with easing the time-intensive demands of cycle management, ultimately contributing to improved breeding efficiency.


Quick Fact: Relief for Uncertain Ovulation Timing The implant supports high predictability, easing the burden associated with frequent monitoring of the mare's cycle.

Regulatory References

  1. Veterinary Medicines Directorate (UK) Public Assessment Report
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Eligibility and Restrictions for Use

Who can and cannot use Ovuplant?

The population eligibility for Ovuplant (Deslorelin acetate implant) is strictly defined by regulatory documents, primarily restricting its use to certain categories of horses (mares) under specific physiological conditions.


Eligibility Criteria

Classification Eligible Population Restriction Summary
Target Population Mares that are actively cycling and considered fit for reproduction. Use is only permitted when a developing ovarian follicle is greater than 30 mm in diameter.
Age Limitation Use is not established in young mares less than three (3) years of age. Safety and efficacy data have not been tested in this specific age group.

Contraindicated Populations

Official labeling defines several groups who must not use the medicine:

  • Pregnant Mares: The product is contraindicated for use in pregnant mares.
  • Animals intended for human consumption: Use is prohibited in horses intended for the food supply.
  • Other Animal Species: The implant is labeled exclusively for Horses (Mares).

Additionally, efficacy is not established for mares in the vernal (spring) transition phase, representing a restriction on use during this specific stage of the breeding season. The eligibility profile focuses solely on the reproductive and physiological status of the mare, with no explicit restrictions documented for conditions like hepatic or renal impairment.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

The regulatory interaction profile for Ovuplant (Deslorelin acetate) is established solely by the information present in authoritative government prescribing documents, such as the Summary of Product Characteristics (SPC). This veterinary medicinal product's profile has been formally reviewed across standardized interaction categories, including pharmacokinetic, pharmacodynamic, and potential conflicts with non-medicinal substances.

The singular, defining regulatory statement across all official documentation is: Interaction with other medicinal products and other forms of interaction: None known.

This definitive position confirms a formal absence of documented interaction risks and constraints:

  • Prohibited Combinations: No specific medicines or product classes are formally designated as contraindicated combinations due to interaction risk.
  • Exposure Modification: The regulatory data contains no documented information on pharmacokinetic alterations to Deslorelin exposure, such as changes mediated by metabolic enzymes (e.g., CYP pathways) or drug transporters.
  • Pharmacodynamic Effects: No known pharmacodynamic conflicts or additive effects with co-administered substances are officially reported in the regulatory documents.
  • Timing and Separation: No mandatory timing-based administration rules or requirements for separating Ovuplant from food, alcohol, or herbal products are specified, as such restrictions are not necessary based on documented interaction data.

The official regulatory profile, therefore, indicates a complete absence of documented interaction-related constraints across all established categories, making the formal guidance clear regarding concurrent use.

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Mechanism of Action

How Ovuplant Works

Ovuplant's mechanism is a targeted endocrine intervention focused on acutely stimulating the reproductive axis. The active component, Deslorelin, functions as a super-agonist of the Gonadotropin-releasing hormone receptors (GnRH-R) on the pituitary gland.

This immediate and intense binding initiates a direct signaling cascade, overriding the natural pulsatile control of the Hypothalamic-Pituitary-Gonadal (HPG) axis. This receptor stimulation triggers the "flare effect," causing a massive and rapid release of stored Luteinizing Hormone (LH) into the systemic circulation. This induced LH surge acts as the definitive, high-magnitude endocrine signal at the ovarian level.

The systemic LH surge then binds to receptors on the pre-ovulatory dominant follicle, initiating the enzymatic and structural changes necessary for follicle rupture. This mechanism translates the central hormonal signal into the final, observable physiological consequence, causing the event to occur within a narrow window of time. High-concentration exposure must remain transient, as continuous presence causes GnRH receptors to become desensitized and downregulated, which inhibits subsequent hormone release and suppresses the HPG axis.

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Dosage and Administration Information

How to Use Ovuplant: Official Administration Guidelines

Ovuplant is administered according to a strict, single-dose protocol for the reproductive management of mares. The product is an Implantation Tablet containing 2.1 mg of Deslorelin (as Deslorelin acetate) that is designed for acute, time-bound use.


Administration Scope

Entity Official Administration Requirement
Route of Administration Administered exclusively via subcutaneous implantation into the lateral neck area, midway between the head and shoulder.
Dosing Schedule One single implant is used per treatment event. Use is contingent upon the presence of an ovarian follicle confirmed by diagnostics to be greater than 30 mm in diameter.
Frequency Limited to one application per mare during any given oestrus (heat cycle).

Procedural and Time-Based Instructions

Prior to administration, diagnostic confirmation of the required follicular size is mandatory, typically achieved via rectal palpation and/or ultrasonography. The treatment is strictly indicated for normally cycling mares during their sexual season.

Following administration, the mare must be bred or inseminated within the 48-hour period after implantation to align with the expected timeframe for induced ovulation. As the implant is composed of a biodegradable material, it is designed to be absorbed and officially does not require physical removal. The product must not be used if the sterile foil pouch is broken, and the implanting device is for single use only. The product is not recommended for mares under three years of age due to lack of study data in that population.

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Recent Clinical Evidence

Research Evidence / Overview of Studies

Research Focus Evaluation

Studies evaluated whether this compound was associated with changes in joint mobility and pain and inflammation. Research also included examination of the change in swelling over a 12-week period.


Clinical Efficacy Studies

Osteoarthritis (OA)

The majority of clinical trials focused on individuals with chronic OA pain. Clinical trials primarily investigated the compound's effects in relation to observed outcomes. Research included the comparative evaluation of the gastrointestinal profile.

  • Trial Size: A pooled analysis of four Phase III trials included over 5,000 participants.
  • Key Findings: The analysis reported findings related to pain scores and physical function. Results were subject to individual patient variability.

Combination Therapy

Research explored whether the combination of the compound and physical therapy was associated with changes in long-term function. Outcomes were assessed after 6 months of intervention. Evidence remains limited on the suitability for most adults; studies included participants with and without cardiovascular risk factors.


Safety and Tolerability

Research findings included information on individuals with severe liver impairment. Research included an examination of factors influencing reports of stomach irritation. The most frequently reported outcomes related to tolerability were recorded.


Off-Label Explorations

Outside of the core indications, studies have evaluated whether the compound is associated with changes in the symptoms of acute gout flares and has been examined for its anti-inflammatory profile. These explorations are preliminary, and findings related to these uses remain limited.

Key Studies & References Arcoxia (Etoricoxib) Summary of Product Characteristics (focus on safety, contraindications, and liver impairment)

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Frequently Asked Questions (FAQ)

Common questions about Ovuplant (FAQ)

Q: How quickly does Ovuplant start to work?

A: Ovuplant is designed to trigger a specific, time-bound physiological event. Official regulatory summaries indicate that the desired event is typically associated with the 48-hour period following the implantation. This narrow time window is the basis for the subsequent steps required in the reproductive management protocol.

Q: What happens if I miss a dose of Ovuplant?

A: Ovuplant is fundamentally different from a recurring daily medicine. It is administered as a single, one-time implant to achieve an acute hormonal surge during a specific reproductive cycle. Because of this, the concept of a 'missed dose' in the traditional sense does not apply. The treatment is a single application, administered based on specific prior diagnostic findings.

Q: Can Ovuplant be used for reasons other than its main purpose?

A: The official product documentation strictly defines the drug's use. Regulatory documents state that Ovuplant's sole approved indication is for reproductive management to control the timing of a specific physiological event. No other uses are specified or approved in the official labeling.

Q: What are the most common side effects of Ovuplant that people report?

A: According to official documentation, the most frequently documented local events relate to the site of administration. These include localized swelling and slight sensitivity to touch in the area where the implant was placed. These local reactions are typically temporary and short-lived.

Q: Is it normal to have spotting when starting Ovuplant?

A: The safety profile lists systemic effects on the reproductive cycle, such as a temporary increased dioestrous period (a longer interval between cycles). However, the official documentation does not specifically list uterine spotting or bleeding as one of the expected adverse reactions.

Q: Can I use Ovuplant while breastfeeding?

A: Official regulatory warnings classify Ovuplant as contraindicated (must not be used) in animals intended to produce milk that is consumed by humans. The prohibition on use in these circumstances is a definitive safety constraint outlined in the official product labeling.

Q: Why is Ovuplant sometimes prescribed instead of other treatments?

A: Ovuplant is characterized by its specific purpose: to provide precise, chemical control over the timing of a reproductive event. This precision facilitates the careful, planned scheduling required in professional breeding programs. It is a key factor cited for its use in specific protocols.

Q: What if I forget to take Ovuplant at the usual time?

A: The application of Ovuplant is strictly dependent on prior diagnostics that confirm a specific internal condition, such as the size of a follicle. Furthermore, the breeding window is strictly within 48 hours of administration. Therefore, the strict adherence to timing, contingent on diagnostic findings, is essential for the expected treatment outcome.

Q: How long can someone safely use Ovuplant?

A: The official administration schedule is strictly defined by regulatory documents. Use is limited to one single implant per cycle, meaning it is not designed for continuous, long-term use. This instruction defines the maximum frequency of use.

Q: Is Ovuplant available in different strengths or forms?

A: According to the official composition summaries, Ovuplant is manufactured as a single strength implantation tablet containing 2.1 mg of Deslorelin acetate. No other strengths or forms are listed in the product's regulatory labeling.

Q: What if Ovuplant doesn't seem to be working for me?

A: Official warnings clarify that the treatment's effectiveness depends on specific physical conditions being met, such as the follicle being of a minimum size (greater than 30 mm). Effectiveness is also not established for use during a specific time in the breeding season known as the vernal transition phase, pointing to conditions that official documents note are necessary for the expected outcome.

Q: Is Ovuplant the same as a regular birth control pill?

A: Ovuplant is officially defined for use in reproductive management and is not classified as a continuous birth control method. It is a single-dose implantation tablet designed to induce a specific event, which is distinct from the mechanism and long-term use of continuous oral contraceptives.

Q: Can Ovuplant cause weight gain?

A: While not a documented side effect for Ovuplant specifically, regulatory labeling for a related Deslorelin product used in other animal species has reported an adverse event of weight gain.

Q: Are there any long-term effects of using Ovuplant?

A: The primary documented long-term consequence of the induced hormonal surge is an increased dioestrous period. This means that a longer-than-usual interval may occur between the induced reproductive event and the subsequent spontaneous event.

Q: Does Ovuplant affect laboratory test results?

A: The active ingredient, Deslorelin, functions as a GnRH agonist that works by acutely stimulating and then suppressing the release of hormones. These hormonal changes are associated with influences on specific laboratory values, such as Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH), which are commonly measured in testing.

Q: Is Ovuplant known to affect skin or hair?

A: The most common documented events relate directly to the skin at the administration site. These administration site reactions include localized swelling and elevated skin temperature in the immediate area of the implant.

Q: What kind of studies support the use of Ovuplant?

A: The product's regulatory approval is supported by clinical studies that demonstrated its specific efficacy. These trials focused on the drug's ability to reliably induce the desired event within the 48-hour period following administration in eligible subjects.

Q: Does Ovuplant contain estrogen?

A: The product's official composition lists the active ingredient as Deslorelin acetate, which is a synthetic GnRH agonist. The documentation does not list estrogen as a component of the formulation.

Q: How is Ovuplant absorbed by the body?

A: Ovuplant is specifically formulated as a biodegradable implant designed for subcutaneous administration, meaning it is placed just beneath the skin. From this location, the biodegradable material slowly releases the active ingredient, which is then absorbed by the body.

Q: What are the possible risks associated with using Ovuplant?

A: The official safety constraints are defined in regulatory documents. The primary specified risk is that the product is contraindicated (must not be used) in pregnant animals due to the recognized potential for harm to the fetus. It is also excluded from use in very young subjects (under 3 years old).

Q: Does Ovuplant affect bone density?

A: While not a primary documented side effect for this specific product, similar, long-acting drugs in the GnRH agonist class can be associated with the suppression of sex hormones. Research indicates that this prolonged suppression may be associated with changes in bone mineral density.

Q: Is it necessary to have check-ups while using Ovuplant?

A: Regulatory documents state that diagnostic procedures, such as palpation or ultrasound, are mandatory before the treatment is administered to confirm eligibility. Monitoring is also recommended after administration to confirm the induced event.

Q: Does Ovuplant cause allergic reactions?

A: Official product information advises that caution should be exercised regarding hypersensitivity. For related Deslorelin products, severe allergic reactions, such as a rash or swelling, have been listed as rare but possible serious side effects.

Q: What are the official clinical trial results for Ovuplant?

A: Official trial summaries confirmed the treatment’s predictable timing of action. The data demonstrated that Ovuplant achieved the desired reproductive outcome in a specific, measurable percentage of eligible subjects within the 48-hour period following administration.

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How should Ovuplant be stored and disposed of?

How to Store and Dispose of Ovuplant (Deslorelin Acetate)

The storage and disposal of Ovuplant must strictly adhere to the conditions outlined in the official regulatory product labeling.

Official Storage Requirements

Ovuplant must be kept refrigerated at a temperature range of 2 C to 8 C. It is mandatory that the product must not be frozen. The product has a labeled shelf life of two years when stored under these specified conditions.

The implant is supplied in a sealed foil pouch and should not be used if the pouch integrity is compromised. All packaging, including the original implanter, must be stored out of the sight and reach of children.

Disposal Instructions

Any unused or expired veterinary medicinal product and waste materials derived from Ovuplant should be disposed of strictly in accordance with local requirements. The implanter must not be reused and should be discarded following the guidance of the local waste regulation authority.

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

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