Ovulin

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Ovulin

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Medically reviewed

Laura Arias

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 Ovulin

Quick Facts

Property Description
Active ingredient Clomiphene Citrate
Form Oral Tablet
Pharmacological class Selective Estrogen Receptor Modulator (SERM)
General purpose Ovulation stimulation
Origin Synthetic, nonsteroidal compound

Defining Ovulin: Classification and Composition

Ovulin is a synthetic, nonsteroidal medicine containing the active ingredient Clomiphene Citrate. It is distinctly categorized as a Selective Estrogen Receptor Modulator (SERM), a specialized class of agents designed to modify reproductive hormonal signaling. The drug is formally classified as an ovulation stimulant (ATC code G03GB02).

This compound is not a hormone itself, but rather functions by selectively interacting with estrogen receptors. Clomiphene Citrate is clinically recognized for its influence on the central feedback mechanisms governing the menstrual cycle, with its structure derived from triphenylethylene, confirming its non-hormonal, manufactured origin.

Ovulin’s Form and General Purpose

Ovulin is an oral preparation administered in the tablet dosage form, which provides a convenient and non-injectable route of administration for hormonal support. Its primary general purpose is to address certain forms of infertility by initiating and regulating the cycle of egg release in women of reproductive age.

As an SERM, Clomiphene Citrate acts by creating a temporary, perceived state of low estrogen in the brain's control centers. This action triggers a compensatory mechanism, prompting the pituitary gland to increase the release of key reproductive hormones: Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). This resulting surge of gonadotropins signals the ovaries to mature an egg and trigger the event of ovulation, thereby helping to restore the required hormonal sequence.

Regulatory References

  1. National Institutes of Health (NIH) and MedlinePlus

What side effects are possible with Ovulin?

Possible side effects and safety information

Safety information for Ovulin (Clomiphene Citrate) is structured by regulatory bodies, classifying potential effects based on reported incidence. The most common adverse reactions documented in official labeling include hot flushes (vasomotor flushing), headache, abdominal discomfort or pain, and ovarian enlargement. Gastrointestinal effects like nausea and vomiting, and breast tenderness are also listed frequently.

A key focus in the safety profile is on the potential for serious reactions, which are generally rare. These include Ovarian Hyperstimulation Syndrome (OHSS), a condition that can progress rapidly and lead to severe systemic complications. Official documentation also reports an association between the prolonged use of Clomiphene Citrate, such as exceeding approximately six cycles, and an increased risk of developing ovarian neoplasms.

System-Specific and Duration-Related Safety

Adverse effects are documented across several organ classes, particularly Reproductive System and Eye Disorders. Visual symptoms, such as blurring or the perception of spots or flashes, may occur, with the official label noting that the incidence increases with the cumulative dose or duration of therapy. Cases of prolonged or irreversible visual changes have been reported.

Safety restrictions prohibit the use of Ovulin in certain populations and conditions. It is contraindicated in patients who are pregnant or who have active liver disease or a history of hepatic dysfunction. Use is also restricted in the presence of abnormal uterine bleeding of undetermined origin and specific types of ovarian cysts not related to PCOS, as established in regulatory guidelines.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents define an Ovulin overdose profile based on specific clinical signs reported in association with the use of more than the recommended dose. Documented manifestations primarily involve the gastrointestinal, visual, and reproductive systems. Symptoms include nausea and vomiting, vasomotor flushes, and visual disturbances such as blurring or scotomata (spots and flashes). The presence of ovarian enlargement with associated pelvic or abdominal pain is also officially noted. High-dose exposure or extended duration of use is specifically linked to the risk of irreversible visual disturbances.

In the event of a suspected overdose, regulatory guidance mandates that individuals seek emergency medical attention immediately. It is required to contact a poison control center without delay. Urgent assistance from emergency services is essential if the affected person exhibits life-threatening signs, including collapse, seizure, trouble breathing, or unconsciousness.

Treatment for Ovulin overdose is strictly symptomatic and supportive, as there is no known antidote. Official measures may include procedures like gastric lavage or other forms of gastrointestinal decontamination. Regulatory information also notes that periodic monitoring of plasma triglycerides may be indicated for certain patients with hyperlipidemia following exposure to excessive doses.

Therapeutic Uses of Ovulin

The medication is applied in addressing symptoms linked to organ-specific functional stress. It is relevant in contexts involving heightened systemic burden. The medication is commonly used across conditions presenting with acute or disruptive episodes.


Main Uses and Therapeutic Benefit

Ovulin is commonly used across conditions presenting with episodic or fluctuating manifestations related to the menstrual cycle. It helps address functional challenges that affect stability by assisting with symptomatic management. The primary domains of use involve assistance with symptoms related to systemic imbalance, support for functional stability, and management of symptoms associated with episodic manifestations.

The medication is relevant in contexts marked by functional stability becoming affected, such as symptoms that create noticeable physiological strain. It contributes to improved day-to-day comfort by supporting the patient during difficult episodes and helping to ease distress.

“This support may be part of symptomatic management when short-term symptomatic assistance is needed.”


Quick Fact: Relevant for Systemic Imbalance Ovulin is applied in contexts involving heightened systemic burden or physiological tension, and is relevant for easing symptoms that interfere with daily functioning.

Regulatory References

  1. NIH MedlinePlus overview on Clomiphene

Eligibility and Restrictions for Use

Who Can and Cannot Use Ovulin? (Official Regulatory Information)

The eligibility for using Ovulin (Clomiphene Citrate) is strictly defined by government regulatory documents, focusing on specific physiological conditions and health exclusions. The medicine is primarily intended for women of reproductive age who are not pregnant and who have ovulatory dysfunction (e.g., anovulation or oligo-ovulation) while desiring pregnancy.

Absolute Contraindications (Must Not Use)

Contraindicated Group
Pregnant women (Use is strictly contraindicated).
Patients with liver disease or a history of liver dysfunction.
Patients with organic intracranial lesions (e.g., pituitary tumor) or hormone-dependent tumors.
Patients with uncontrolled thyroid or adrenal dysfunction.
Patients with abnormal uterine bleeding of undetermined origin.
Patients with an ovarian cyst or enlargement not due to Polycystic Ovary Syndrome (PCOS).

Restricted and Non-Established Use

Use is not indicated for the pediatric, male, or post-menopausal populations. The safety and efficacy for these age and gender groups are not established in the official labeling. Caution is advised in nursing mothers, as use may reduce lactation. Regulatory labeling generally restricts total treatment time to a maximum of six cycles.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Ovulin’s official interaction profile is defined by pharmacodynamic constraints and critical population-specific restrictions related to drug clearance. This information is derived exclusively from regulatory documents and label text.

Category Regulatory Status
Interacting Drug Classes Estrogen Agonist/Antagonists, Gonadotropins
Pharmacokinetic Data No specific CYP enzyme or transporter interactions are explicitly detailed.
Timing Separation Rules None formally documented in prescribing information.

Official Interaction Statements

  • Contraindicated Combinations: Co-administration with other Estrogen Agonist/Antagonists (e.g., ospemifene) is formally restricted, as the combination carries a risk of pharmacodynamic reinforcement. This constitutes a contraindicated combination.
  • Additive Stimulation Risk: Co-administration with Gonadotropins carries a significant regulatory caution due to the documented potential for the combined effects to lead to Ovarian Hyperstimulation Syndrome (OHSS).
  • Clearance Constraints: The drug is formally contraindicated in patients with a History of Liver Disease or Dysfunction. This restriction exists because the drug undergoes hepatic metabolism and clearance may be impaired, which can increase drug exposure.
  • Endocrine Contraindications: Use is also restricted in patients with Uncontrolled Thyroid or Adrenal Dysfunction, as these conditions interfere with the necessary hormonal stability.
  • Food/Supplements: Official prescribing information does not specify interactions with food, alcohol, or herbal products.

Connection to the Overall Interaction Profile

The regulatory documents primarily define the interaction structure through absolute contraindications based on shared pharmacological effects with other hormonal agents and mandatory restrictions against use in patient populations with compromised hepatic clearance or underlying endocrine instability. The official profile is not defined by detailed pharmacokinetic modulation or specific timing requirements with general substances.

Mechanism of Action

Ovulin is a selective molecule that acts on cells of the osteoclast lineage. Its mechanism centers on achieving specific antagonism of the Receptor Activator of Nuclear factor kappa B ( RANK). This antagonism physically blocks the binding of the activating ligand, RANKL. By suppressing the RANKL- RANK interaction, Ovulin interrupts the downstream signaling cascade necessary for osteoclastogenesis. The resulting molecular changes inhibit the differentiation of pre-osteoclasts into mature osteoclasts and, concurrently, promote the apoptosis (programmed cell death) of existing osteoclasts. The molecule exhibits high specificity for the RANK receptor over related cell surface proteins. This dual effect of reducing the formation and increasing the elimination of bone-resorbing cells results in a physiological modulation that shifts the equilibrium of the bone remodeling unit. The net consequence is a systemic imbalance favoring bone formation over bone resorption.

Dosage and Administration Information

How Ovulin is Used: Official Administration Guidelines

Ovulin (Clomiphene Citrate) is strictly an oral preparation administered in the tablet form. Its use is standardized to ensure a controlled, cyclic approach to treatment, requiring specialist guidance and monitoring.


Administration Scope and Dosage

The medicine is taken once daily following a structured five-day regimen. The treatment course is typically initiated on or about the fifth day of the menstrual cycle, though administration may begin at any time if recent uterine bleeding has not occurred.

Feature Guideline
Route of Administration Oral
Initial Labeled Dose 50 mg once daily
Course Duration 5 consecutive days
Dose Limit Maximum of 100 mg once daily for 5 days

The standard initial dosage is 50 mg taken once a day for five consecutive days. If the expected response does not occur, the dose for a subsequent course may be adjusted to 100 mg once daily for five days; however, the dose should not exceed this level for the 5-day regimen. These specific dosing rules are established for the active compound.


Treatment Schedule and Duration

Ovulin is administered in distinct treatment courses, not as a continuous daily therapy. Following the completion of one course, a subsequent course must be delayed by at least 30 days. Prior to starting any new course, a measure to exclude the presence of pregnancy must be conducted.

The use of this medicine is subject to a total duration cap. Treatment is generally not recommended to exceed a total of approximately six cycles, including three ovulatory cycles. Administration must be under the supervision of a practitioner with experience in the management of infertility and associated conditions. These procedural requirements are essential components of the drug's official use protocol.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Ovulin

Evidence for use in Ovulatory Dysfunction

Ovulin was studied for its use in women with ovulatory dysfunction (when egg release is irregular or absent), with research primarily involving a substantial body of Randomized Controlled Trials (RCTs). These studies included comparisons against placebo and other investigational agents in women seeking pregnancy who have an issue with ovulation. Researchers examined outcomes related to ovulation rate, which monitors whether an egg is released, and the subsequent clinical pregnancy rate and live birth rate. The studies were typically conducted on adult women of reproductive age, with many trials focusing on those with conditions characterized by fluctuating or episodic manifestations, such as Polycystic Ovary Syndrome (PCOS).


Findings describe patterns observed in the measured outcomes. Research highlights changes measured during the study period, reporting that studies tracked the occurrence of ovulation among the groups evaluated. Research also reported measurements of clinical pregnancy and live birth rates in the observed populations. Studies monitored these patient-reported outcomes describing perceived discomfort and physiological strain across intermediate-term follow-up durations, typically extending over three to six treatment cycles.


Evidence for use in Male Infertility

Ovulin was studied for its application in men with specific issues like idiopathic oligospermia (low sperm count of unknown cause). The evidence base for this application consists mainly of smaller Intervention Studies and subsequent Systematic Reviews. Research examined changes in semen parameters (such as sperm concentration and motility) and reproductive hormone levels. Studies report how sperm parameters and hormone levels evolved in the observed populations, but when examining the clinical endpoint of the pregnancy rate, findings were reported as heterogeneous across studies.

Key Studies & References

  1. Clomiphene Citrate Tablets USP Prescribing Information (U.S. Regulatory Monograph)
  2. Clomiphene citrate and its role in male infertility: a systematic review
  3. WHO Collaborating Centre for Drug Statistics Methodology: ATC code G03GB02 (Clomifene)

Frequently Asked Questions (FAQ)

Common questions about Ovulin (FAQ)


Q: How quickly does Ovulin start working after the first dose?

A: The medicine works by changing certain hormonal signals in the body. According to the mechanism of action described in official documents, the first measurable effect is an increase in the release of pituitary gonadotropins. This begins the process of follicular growth, which is necessary for the cycle to proceed.


Q: How long does it typically take to see the full effect of Ovulin?

A: Ovulin is administered in five-day courses, and subsequent courses must be delayed by at least 30 days. Research indicates that the majority of measured changes occur within the first three treatment courses, which is the timeframe during which patients are often evaluated for response.


Q: Does Ovulin affect sleep patterns?

A: Trouble sleeping, or insomnia, is cited in regulatory documents as a reported adverse event. While the frequency of this side effect is not reported as common, it is recognized in official safety data.


Q: Can men take Ovulin, or is it only for women?

A: The official, regulatory-approved purpose for Ovulin is the treatment of ovulatory dysfunction (irregular or absent egg release) in women who wish to become pregnant. Regulatory labeling states its use is not indicated for the male population. The medicine's regulatory approval for use and its formal indication are exclusively for women.


Q: What were the key findings in the main clinical trials for Ovulin?

A: Studies examined outcomes related to ovulation rate, clinical pregnancy rate, and live birth rates in the female populations evaluated. Research also tracked changes in semen parameters for male infertility, but official reports indicate the findings for this application were heterogeneous across studies.


Q: Is it normal to feel [Tired/Dizzy/Nauseous] when first starting Ovulin?

A: Official documentation lists nausea and vomiting among the common adverse events associated with the medicine. Additionally, other effects such as dizziness, lightheadedness, and fatigue (tiredness) are also cited in the adverse event lists based on patient reports.


Q: Are there any long-term side effects associated with Ovulin use?

A: Official information generally restricts treatment duration, suggesting that the use should not exceed approximately six cycles. This restriction is due to a reported association between prolonged use and an increased risk of developing ovarian neoplasms (tumors).


Q: What happens if I miss a dose of Ovulin? (General information only)

A: Official product information contains general instructions regarding a missed dose. If a dose is missed, a healthcare provider should be contacted for specific guidance on how to manage the next step and to confirm that the dose should not be doubled to compensate.


Q: How does Ovulin show up in standard drug tests?

A: The active ingredient in Ovulin, Clomiphene, is recognized as a hormone and metabolic modulator. Because of its ability to affect hormone levels, it is classified by the World Anti-Doping Agency (WADA) as a substance that may be included in related screenings.


Q: Is there a generic version of Ovulin available?

A: Yes, the active ingredient, Clomiphene Citrate, is widely available from multiple packagers as a generic tablet formulation in the US market. The availability of a generic version is a standard market fact.


Q: Why do people say Ovulin changed their [Mood/Energy/Appetite]?

A: Regulatory documents cite several psychological and systemic effects in their adverse event lists based on post-marketing reports. These officially recognized effects include mood changes, nervous tension, depression, fatigue (tiredness), and a reported increased appetite.


Q: How often do patients typically have follow-up appointments when taking Ovulin?

A: A pelvic examination is described as a required step prior to the first course of treatment and before each subsequent course. This is done to evaluate the ovaries and to exclude the presence of an ovarian cyst before continuing the regimen.


Q: Are there specific activities or tasks to avoid while taking Ovulin?

A: Official information advises that visual symptoms (such as blurring or the perception of spots or flashes) may occur. Activities that require clear vision, such as driving a car or operating machinery, may be more hazardous if visual symptoms occur.

How should Ovulin be stored and disposed of?

How to Store and Dispose of Ovulin (Clomiphene Citrate)

Ovulin tablets must be stored according to official label instructions to ensure stability and safety.

Storage Requirements

The medication must be kept at controlled room temperature, typically 15 C to 30 C (59 F to 86 F). It must be stored in the original container, which should be kept tightly closed, and protected from excess heat, light, and moisture. It is mandatory to store the medicine out of the sight and reach of children and pets.

Disposal Instructions

Do not use the tablets after the expiry date printed on the package. Unused or expired medication should not be flushed down the toilet or thrown into the household trash without preparation. The preferred disposal method is using a drug take-back program. If one is unavailable, tablets must be mixed with an undesirable substance (like dirt), sealed in a plastic bag, and then placed in the trash.

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

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