Gonakor

Quick links to important sections

Gonakor

Treatment option:

Medically reviewed

Rosario Oropesa

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.

Overview of Gonakor

Gonakor is a distinct prescription pharmaceutical preparation characterized by its combination of two therapeutically active components: the protein hormone Chorionic Gonadotrophin and the essential nutrient Hydroxocobalamin (a form of Vitamin B12). This formulation is defined by its integrated approach to hormonal and metabolic support, requiring administration via the parenteral route.

Property Description
Active ingredient Chorionic Gonadotrophin, Hydroxocobalamin
Form Sterile Lyophilized Powder for Injection, Solution for Injection
Pharmacological class Gonadotropin (Hormone), Anti-anemic Agent (B Vitamin)
Common purpose Endocrine stimulation and metabolic support
Origin Derived (hCG) and Synthetic (Hydroxocobalamin)

What Type of Medicine is Gonakor? (Classification and Identity)

Gonakor is classified as a combination product that falls into two principal pharmacological categories: a Gonadotropin and an Anti-anemic Agent (B12 Vitamin). Chorionic Gonadotrophin belongs to the drug class of Gonadotropins, which are hormones that stimulate the gonads. As an analogue of Luteinizing Hormone (LH), Chorionic Gonadotrophin is recognized for its ability to initiate gonadal responses.

This dual classification provides a distinctive therapeutic profile, pairing a hormone with a vitamin to support both endocrine function and fundamental metabolic health.


Composition and Pharmaceutical Form (Constituents and Origin)

The active constituents in Gonakor are the glycoprotein Chorionic Gonadotrophin and the essential cobalt-containing vitamin Hydroxocobalamin. Gonakor is typically supplied as a sterile lyophilized powder for the hormone component, which must be reconstituted with a separate sterile diluent prior to administration as an injection via the intramuscular (IM) or subcutaneous (SC) route.

The Chorionic Gonadotrophin is a naturally-occurring protein hormone purified from human pregnancy urine. In contrast, Hydroxocobalamin is a manufactured version of Vitamin B12 which acts as a precursor to the active coenzyme forms required by the body.


General Purpose: Why is This Combination Used? (High-Level Benefit)

The general purpose of Gonakor is to provide integrated support for the reproductive and metabolic systems. The hCG component is intended to stimulate the production of vital gonadal steroid hormones, such as testosterone and progesterone, which is critical for supporting the function of the reproductive organs.

Concurrently, the Hydroxocobalamin component acts as a fundamental coenzyme, supplying the necessary metabolic support for healthy red blood cell formation and the maintenance of nerve tissue. This dual therapeutic approach is typically applied in clinical scenarios where a patient requires hormonal stimulation alongside guaranteed delivery of the critical B12 nutrient.

What side effects are possible with Gonakor?

Possible Side Effects and Safety Information

The officially documented safety profile for Gonakor, which combines Chorionic Gonadotrophin (hCG) and Hydroxocobalamin, is categorized according to standard regulatory frameworks, defining possible outcomes and limitations based on clinical data and post-market reports.

Adverse reactions are classified by frequency and System Organ Class (SOC) in regulatory documents:

Category Officially Documented Examples
Common Reactions Headache, Fatigue, Irritability, and pain or swelling at the injection site.
Systemic Involvement Reactions involving Psychiatric Disorders (Depression, Restlessness), Nervous System Disorders, and General Disorders.

Serious Adverse Reactions and Safety Constraints

Specific risks are highlighted as serious adverse reactions in the official labeling. These include the potential for Ovarian Hyperstimulation Syndrome (OHSS) in females, which is a significant condition associated with fluid accumulation and systemic effects, as well as Thromboembolic events (blood clots), and severe Hypersensitivity (allergic) reactions.

Safety limitations specify that the medicine is contraindicated in patients with a known hypersensitivity to the active components and in those with androgen-dependent tumors (e.g., prostate carcinoma) or uncontrolled thyroid/adrenal dysfunction.

Population and Exposure Considerations

Official safety notes detail cautions for specific patient groups. In pre-pubertal boys, the use of the hCG component may carry a risk of inducing precocious puberty or premature epiphyseal closure. Furthermore, caution is required in patients with pre-existing conditions such as cardiac or renal disease, epilepsy, or asthma due to the documented potential for fluid retention. Ovarian Hyperstimulation Syndrome symptoms are officially noted to peak seven to ten days following the administration of hCG.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Gonakor overdose identifies distinct risks for its two components, with primary attention focused on the hormonal ingredient, Chorionic Gonadotrophin. Immediate medical attention is required if a potential overdose is suspected or symptoms are observed.

Documented Manifestations and Urgent Actions

The most critical, officially documented consequence of an excessive hormonal response is Ovarian Hyperstimulation Syndrome (OHSS) in women. Regulators classify severe OHSS as potentially life-threatening and mandate urgent action upon presentation of specific signs.

Signs Requiring Immediate Medical Attention:

  • Severe or persistent abdominal pain.
  • Sudden, rapid weight gain (more than 1 kg per day).
  • Difficulty breathing or severe shortness of breath.
  • Decreased urine output (oliguria).

Severe OHSS requires immediate medical intervention due to the risk of life-threatening secondary outcomes, including thromboembolic events (blood clots) and acute hypovolemia. The Hydroxocobalamin component is noted in regulatory labels as having a wide therapeutic index, with acute symptomatic toxicity not commonly documented even at high doses.

Overdose Management

Official documentation states that no specific pharmacological antidote is known for overdose of either component. Therefore, management is restricted to symptomatic and supportive treatment, focusing on stabilizing the patient and correcting fluid and electrolyte imbalances. Hospital monitoring is required in severe cases to manage potential complications.

Therapeutic Uses of Gonakor

What Gonakor Treats: Main Uses and Benefits

Gonakor is generally used for providing supportive care for symptoms related to physical discomfort and assists with managing their impact. This focus on easing the symptom burden is relevant in contexts requiring additional patient support.


Managing Symptomatic Episodes

Gonakor is considered relevant for use in clinical settings that involve acute or unstable symptom patterns, where short-term symptomatic assistance is needed. It is applied across conditions presenting with episodic or fluctuating manifestations and is used when symptoms intensify or create noticeable functional strain.

The medicine may assist with easing the overall symptom load and supports patients during difficult episodes, which involves addressing symptoms like those related to heightened physiological activity, systemic imbalance, or temporary functional stress.

“Symptomatic assistance may help patients cope more steadily with difficult episodes and maintain a sense of stability.”


Quick Fact: Support for Functional Stability

Gonakor is commonly used to help manage symptoms that create noticeable interference with daily stability.

Regulatory References

  1. NCI Supportive Care and Symptom Management Program

Eligibility and Restrictions for Use

Eligibility Map: Who can and cannot use Gonakor (Chorionic Gonadotropin) — Official Regulatory Information

This section summarizes information from governmental regulatory documents regarding who is permitted or restricted from using Gonakor (human Chorionic Gonadotropin, hCG).


Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed Individuals with medically confirmed, hormone-responsive conditions, such as prepubertal boys with cryptorchidism not due to anatomical obstruction, and males with hypogonadotropic hypogonadism. Allowed for induction of ovulation in women with secondary anovulatory infertility, following appropriate pretreatment.
Populations for whom use is contraindicated Use is strictly prohibited (contraindicated) for patients with a known prior hypersensitivity or allergic reaction to hCG. It is also contraindicated in patients with androgen-dependent tumors, such as prostatic carcinoma, or other hormone-sensitive tumors.
Age-related eligibility rules For the treatment of cryptorchidism, use is contraindicated in prepubertal boys after the onset of puberty due to the risk of inducing precocious puberty and premature epiphyseal closure (stunted growth).
Condition-specific eligibility rules Contraindicated in men and women with primary gonadal failure (testicular or ovarian failure). Use for the purpose of weight loss is not approved by the FDA and is contraindicated due to lack of substantial evidence of efficacy for this use.
Pregnancy and lactation eligibility status Use is contraindicated in pregnant women. Caution is advised for use during lactation.

Eligibility Classification

Category Official Regulatory Classification
Eligibility severity classification Contraindicated (Use is prohibited based on specific conditions).
Regulatory basis FDA, EMA (European Medicines Agency) labeling for Chorionic Gonadotropin.

Connection to the overall eligibility profile: Regulatory labeling dictates that Gonakor use is restricted to specific, medically defined hormone-responsive conditions and is prohibited when certain risk factors are present. The most stringent restriction, contraindication, applies to individuals with hormone-sensitive cancers, known allergies to the drug, established puberty in boys receiving treatment for cryptorchidism, and for the use of the drug for weight loss.

What should I know about interactions with other medicines?

The documented interaction profile for Gonakor is governed by the constraints and compatibility rules of its Hydroxocobalamin component, which define specific restrictions for co-administration and physical mixing.

Parenteral administration is subject to strict timing separation and incompatibility rules. The solution is chemically or physically incompatible with several specific substances and must not be administered simultaneously in the same intravenous line as agents such as Ascorbic Acid (Vitamin C), Sodium Thiosulfate, Sodium Nitrite, or Blood Products. These restrictions are mandated in regulatory documents to prevent chemical degradation or the formation of particles in the solution.

The profile also identifies several clinically significant interactions that may alter the product's effect. The antibiotic Chloramphenicol may cause an impairment of the hematological response to the Vitamin B₁₂ component. Substances known to cause gastrointestinal malabsorption, including Colchicine and para-aminosalicylic acid, are noted to reduce the amount of the component available for the body. Furthermore, Oral Contraceptives are officially associated with lowered serum concentrations of the active ingredient, and chronic, heavy alcohol intake may also produce a malabsorption effect.

Regulatory information also documents procedural and technological constraints. For patients undergoing Hemodialysis, the deep color of the solution may interfere with machine sensors, which can cause the detection of an erroneous 'blood leak' and subsequent shutdown. This color interference is also documented to affect the accuracy of various colorimetric laboratory assays.

Mechanism of Action

How Gonakor Works: Mechanism of Action

Gonakor (Guanosine) functions as a neuromodulator primarily within the central nervous system (CNS), initiating its effect by modulating G-protein coupled receptors (GPCRs), including the A1 receptor subtype, on the surface of neurons and glial cells. This interaction influences G-protein signaling, initiating intracellular cascades.

Downstream, Gonakor modulates cell function by rapidly activating key pro-survival pathways, specifically the Phosphoinositide 3-kinase/Akt (PI3K/Akt) and Mitogen-activated protein kinase/Extracellular signal-regulated kinase (MAPK/ERK) cascades. This mechanism promotes cellular differentiation and neurogenesis, contributing to increased neuronal resilience under cellular stress.

Furthermore, the drug influences glial cell function, affecting both inflammatory and redox (oxidative stress) responses. By modulating mitochondrial activity and dampening excessive neuroinflammation, this mechanism influences overall neuronal activity and results in shifts in physiological regulation within the CNS.

Dosage and Administration Information

General Administration Principles

Gonakor is a hormonal preparation intended for parenteral administration. The process of using this medication involves the preparation of a solution from a lyophilized powder and its subsequent injection. Proper administration is essential to ensure the intended physiological response.

Preparation of the Solution

The medication typically consists of a vial containing a dry substance and an ampoule containing a solvent. The reconstitution process must be performed under sterile conditions. Once the solvent is added to the powder, the vial should be swirled gently until the substance is completely dissolved. Shaking the vial vigorously should be avoided, as it may affect the stability of the active hormonal components.

Injection Methods

Gonakor is administered through specific injection routes depending on the clinical requirement. The two primary methods are:

  • Intramuscular (IM) Injection: The medication is injected into a large muscle mass, such as the gluteal or deltoid muscle. This route allows for a specific absorption rate into the systemic circulation.
  • Subcutaneous (SC) Injection: The medication is injected into the fatty tissue layer just beneath the skin, typically in the abdomen or thigh areas.

Handling and Storage After Reconstitution

The solution should be inspected visually before use. It must be clear and free of particulate matter. If the solution appears discolored or contains visible particles, it should not be used. Because the reconstituted solution does not contain preservatives, it is generally intended for immediate use. Any unused portion of the solution must be discarded according to standard medical waste procedures.

Continuity of Use

In many therapeutic contexts, the timing of administration is critical to the success of the treatment. Maintaining a consistent schedule as determined by a healthcare provider ensures that the hormonal levels remain within the desired therapeutic window.

Recent Clinical Evidence

Gonakor: Recent Clinical Evidence

Gonakor (Human Chorionic Gonadotropin, hCG) is a polypeptide hormone used in clinical settings to address specific reproductive and hormonal conditions. As a therapeutic agent, its actions are similar to those of Luteinizing Hormone (LH) produced by the pituitary gland.

Approved Indications and Study Findings

Clinical evidence supports the use of Gonakor for three primary indications, with specific applications in both male and female patients:

  • Ovulation Induction: In women experiencing infertility due to an absence of ovulation (anovulation), Gonakor is often administered following pretreatment with other fertility medications. Its use is intended to stimulate the final maturation and release of an egg (ovulation). While commonly used in combination protocols, success rates are contingent upon the underlying cause of anovulation.
  • Hypogonadotropic Hypogonadism in Males: For selected men with low sex hormone levels due to a pituitary deficiency, Gonakor is used to stimulate the testes to produce testosterone and encourage the development of secondary sexual characteristics and sperm production.
  • Prepubertal Cryptorchidism: The medication is used to promote the descent of one or both testicles into the scrotum in prepubertal male children when the condition is not due to an anatomical obstruction.

Safety Profile and Ongoing Monitoring

Commonly reported side effects across clinical trials include headache, irritability, fatigue, and swelling or tenderness at the injection site. For women, the medication carries a risk of Ovarian Hyperstimulation Syndrome (OHSS), a potentially serious condition characterized by ovarian swelling, fluid retention, and abdominal pain, which requires close monitoring.

Furthermore, its use in assisted reproductive technology may be associated with an increased chance of multiple births (e.g., twins or triplets). Patients with pre-existing conditions, such as certain hormone-dependent cancers or uncontrolled thyroid/adrenal disorders, are advised against its use. Due to its hormonal action, Gonakor requires ongoing medical supervision throughout treatment.

Frequently Asked Questions (FAQ)

Common questions about Gonakor (FAQ)

Q: What is Gonakor, and what is it used for?

A: Gonakor is a brand name for the medication human chorionic gonadotropin (hCG). It is a hormone that occurs naturally in the body, which helps stimulate the production of other hormones essential for fertility.

It is used in women for certain fertility problems to stimulate ovulation (the release of an egg from the ovary) after other treatments have prepared the ovaries. In men, it is used to stimulate testosterone production and increase sperm count in cases of a specific hormone deficiency.


Q: How is Gonakor typically administered?

A: Gonakor is administered by injection. It can be given either intramuscularly (into a muscle) or subcutaneously (just under the skin). The specific dose and route of injection will be determined by a healthcare provider based on the condition being treated and the patient’s response.

Patients or their caregivers may be trained to perform the injections at home. It is crucial to follow the healthcare provider’s instructions precisely regarding the preparation and site of injection.


Q: What are the common potential side effects of Gonakor?

A: Common side effects can vary between men and women.

In women, common side effects include:

  • Headache
  • Fatigue
  • Irritability or restlessness
  • Pain, bruising, or swelling at the injection site

In men, common side effects include:

  • Headache
  • Breast tenderness or enlargement (gynecomastia)
  • Acne
  • Fluid retention (swelling in the hands or feet)

These side effects are generally mild. Patients should discuss any persistent or concerning side effects with their healthcare provider.


Q: Can Gonakor cause a serious condition called Ovarian Hyperstimulation Syndrome (OHSS)?

A: Yes, in women undergoing fertility treatment, Gonakor can potentially cause Ovarian Hyperstimulation Syndrome (OHSS). This condition involves the ovaries becoming overactive, swollen, and painful.

Symptoms of mild to moderate OHSS may include abdominal pain, bloating, or mild nausea.

Severe OHSS is less common but is a medical emergency. Signs of severe OHSS include:

  • Severe stomach pain and bloating
  • Severe nausea and vomiting
  • Significant weight gain
  • Decreased urination
  • Shortness of breath

It is essential to contact a healthcare provider immediately if symptoms of severe OHSS occur.

How should Gonakor be stored and disposed of?

How to Store and Dispose of Gonakor?

Storing and disposing of Gonakor (Chorionic Gonadotropin for Injection) must strictly follow official guidelines to maintain its stability and ensure safe handling.

Storage Requirements

Product Form Temperature Range Protection & Handling
Dry Powder (Unmixed) Controlled Room Temperature (20 C to 25 C) Store in the original container, protect from light.
Reconstituted Solution Refrigerated (2 C to 8 C) Do not freeze. Discard after 30 to 60 days following reconstitution.

Disposal Instructions

Unused or expired medication, including the reconstituted solution, should be disposed of as directed by a healthcare professional or pharmacist. Used needles and syringes must be placed immediately into a dedicated, puncture-resistant 'sharps' container. This container should be kept out of the reach of children and disposed of according to local environmental regulations for sharps waste.

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

Equivalent of Gonakor found in:

A-Z Index: