Mirvala 28

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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.

Overview of Mirvala 28

Quick Facts

Property Description
Active ingredients Desogestrel, Ethinyl Estradiol
Form Tablet (Oral)
Pharmacological class Combined Oral Contraceptive (COC)
Common use Systemic prevention of pregnancy
Origin Synthetic Hormones

What Type of Medicine is Mirvala 28?

Mirvala 28 is a brand name for a prescription-only Combined Oral Contraceptive (COC) used primarily for systemic contraception. It belongs to the high-level pharmacological class of Oestrogen and Progestogen Combinations, functioning as a hormonal regulator. The medication is delivered in the dosage form of an oral tablet, manufactured by Apotex Inc. for the 28-day regimen market. This product is defined as monophasic, meaning the concentration of its active components remains uniform across all active tablets within the cycle, providing a consistent hormonal exposure.

Mirvala 28: A Synthetic Combination of Active Ingredients

The drug entity is characterized by the combination of two synthetic hormone components: the progestin Desogestrel and the estrogen Ethinyl Estradiol. This pairing distinguishes Mirvala 28 and its generic counterparts from other oral contraceptives. Desogestrel is specifically recognized as a third-generation progestin. This formulation, delivered as an oral tablet, confirms the medication's nature as a combined hormonal product, reflecting the synergistic effect of the two hormone types.

What is the Primary Purpose of Mirvala 28?

The primary purpose of Mirvala 28 is the reliable prevention of pregnancy in women of reproductive age. The effectiveness of this function is based on a multi-targeted hormonal action. The core action is ovulation suppression, where the synthetic hormones inhibit the body’s signals that would otherwise prompt the release of an egg from the ovary. Secondary actions include altering the cervical mucus to impede sperm entry and changing the endometrial lining to discourage implantation, establishing the medication as a continuous, robust form of systemic contraception.

Regulatory References

  1. Oral Contraceptive Pills - StatPearls - NCBI Bookshelf - NIH

What side effects are possible with Mirvala 28?

Possible Side Effects and Safety Information

The safety profile of Mirvala 28 (Desogestrel and Ethinyl Estradiol) is characterized by a range of commonly documented, non-serious adverse reactions alongside specific rare but serious risks, as outlined in official regulatory documents.


Frequency-Classified Adverse Reactions

Adverse reactions are classified by frequency based on clinical and post-marketing data, following regulatory standards:

Frequency Category Examples of Documented Effects
Very Common Headache, irregular bleeding (spotting or breakthrough bleeding).
Common Nausea, depressed mood, abdominal pain, breast tenderness, weight gain.
Uncommon Fluid retention, migraine, vomiting, diarrhea, rash, decreased libido.
Rare Venous thromboembolism (VTE), arterial thromboembolism (ATE), hypersensitivity reactions, chloasma (melasma).

Serious Adverse Reactions and Safety Constraints

The most significant safety concerns are related to Thromboembolic Events, which are considered rare but serious adverse reactions. These include Venous Thromboembolism (VTE), such as Deep Vein Thrombosis and Pulmonary Embolism, and Arterial Thromboembolism (ATE), such as Myocardial Infarction and Stroke. The official labeling also notes the rare risk of Hepatic Neoplasms (liver tumors).

The risk of VTE is highest during the first year of use, particularly when a woman is starting this type of combined oral contraceptive for the first time or restarting after a break of four or more weeks. The official safety information specifies that the risk of serious cardiovascular events is substantially increased in smokers, particularly those over 35 years of age.

Usage is subject to explicit restrictions (contraindications), including a history of venous or arterial thrombotic events, known or suspected sex hormone-dependent malignancies, or severe hepatic disease.

Overdose and Emergency Response

The official regulatory documentation defines the overdose profile for Mirvala 28 (Desogestrel and Ethinyl Estradiol) based strictly on documented clinical manifestations and mandated emergency actions.


Documented Overdose Manifestations

Overdosage with this combined oral contraceptive is primarily associated with gastrointestinal and gynecological disturbances. The most consistently documented acute clinical manifestations include nausea and vomiting. Additionally, patients may experience vaginal bleeding or withdrawal bleeding following the ingestion of a dose significantly higher than prescribed. Regulatory summaries specify that this bleeding manifestation may also occur in female children or adolescents following accidental exposure. The acute presentations documented in official labeling are not typically classified as serious or life-threatening.


Emergency Action and Supportive Management

Immediate medical attention must be sought if an overdosage is suspected or confirmed. Official guidance mandates that individuals contact Poison Control or local emergency services without delay to ensure appropriate clinical evaluation. This action is required even when documented symptoms are mild. In the event of overdosage, no specific antidote is known for the Desogestrel/Ethinyl Estradiol combination. Consequently, the procedural approach for clinical management is strictly limited to providing symptomatic and supportive treatment to address the patient’s acute clinical needs and manage any documented manifestations.

Therapeutic Uses of Mirvala 28

What Mirvala 28 Treats: Main Uses and Benefits

Mirvala 28 (Desogestrel and Ethinyl Estradiol) is generally utilized across two main therapeutic domains: reliable conception management and symptomatic relief from recurrent menstrual disorders. In clinical use, the medication is applied to prevent pregnancy and may be used to manage certain gynecological symptoms.


Therapeutic Scope

Mirvala 28 is primarily indicated for continuous, systemic prevention of pregnancy. It is also considered relevant for easing symptom clusters that may become intense or disruptive, helping to manage conditions that present with heightened symptoms such as menorrhagia (heavy blood loss), dysmenorrhea (severe menstrual cramping), and pain associated with endometriosis. This use contributes to improved comfort during periods of heightened symptoms and assists with supporting functional stability when symptoms are more noticeable. It is commonly used to help patients cope more steadily with symptom fluctuations, particularly for women of reproductive age, including post-menarche adolescents, who require consistent cycle control.


Quick Fact: Therapeutic Benefit Summary

Symptom Managed Therapeutic Benefit
Heavy Menstruation (Menorrhagia) Supports a reduction in blood flow, leading to lighter periods.
Menstrual Pain (Dysmenorrhea) Helps ease the overall burden of painful monthly cramping.
Cycle Irregularity Assists in establishing a predictable, stable monthly pattern.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Mirvala 28 is officially indicated for females of reproductive potential for the prevention of pregnancy. Eligibility is defined by a comprehensive list of absolute contraindications detailed in regulatory documents.


Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed Females of reproductive potential who elect to use the product.
Populations for whom use is not recommended Nursing mothers/women who are breastfeeding (due to potential for decreased milk production and hormone transfer).
Populations for whom use is contraindicated Women with a history of or current venous or arterial thrombotic diseases (VTE/ATE), hormone-sensitive malignancies (e.g., breast cancer), active severe liver disease, uncontrolled hypertension, diabetes with vascular involvement, or migraine with focal neurological symptoms.
Age-related eligibility rules Use is not established in females before menarche. Not indicated for use in postmenopausal women.

Resulting Eligibility Structure

Official eligibility statements:

  • Use is contraindicated in women who are over age 35 and smoke heavily ( >15 cigarettes per day).
  • The medicine must not be used in women with known or suspected pregnancy.
  • Use requires discontinuation at least 4 weeks prior to major surgery or prolonged immobilization.

Connection to the overall eligibility profile: Regulatory documents define who can use Mirvala 28 by establishing strict absolute contraindications related to cardiovascular, hepatic, and hormonal risks. This structure restricts the use of this combined oral contraceptive to women who are of reproductive age and do not possess these documented high-risk health conditions or vascular risk factors.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The efficacy of this product, which contains the hormones desogestrel and ethinyl estradiol, may be reduced by concurrent use with certain medicinal products. This is primarily due to pharmacokinetic interactions that result in increased clearance and decreased plasma concentrations of the contraceptive hormones.

Significant Interacting Agents and Product Classes

The primary class of interacting agents is Hepatic Enzyme Inducers, which includes certain anticonvulsants (e.g., Phenytoin, Carbamazepine, Phenobarbital), antituberculosis drugs (e.g., Rifampicin, Rifabutin), and specific HIV/AIDS medications. The official product labeling also explicitly lists the herbal product St. John’s wort (Hypericum perforatum) as an agent that can diminish the effects of the tablets, which is related to its enzyme-inducing properties. For these agents, an alternative or additional contraceptive method is required during and for 28 days after stopping the interacting drug.

Contraindicated Combinations and Other Constraints

This product is contraindicated for use with the Hepatitis C virus combination drug regimens containing Ombitasvir, Paritaprevir, and Ritonavir (with or without Dasabuvir), or medicinal products containing Glecaprevir/Pibrentasvir. These combinations can cause significant elevations in liver enzymes. Additionally, a procedural constraint requires the discontinuation of the product at least four weeks prior to and during a period after major surgery or prolonged immobilization, which is associated with an increased risk of thromboembolism.

Mechanism of Action

Mirvala 28, a combination hormonal contraceptive, contains the progestin desogestrel and the estrogen ethinyl estradiol. The active metabolite of desogestrel, etonogestrel, and ethinyl estradiol exert their primary actions via agonism at the progesterone receptor (PR) and estrogen receptor (ER), respectively, located in target cells across multiple tissues, including the hypothalamus, pituitary gland, ovaries, and endometrium.

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The activation of these nuclear receptors modifies gene transcription, which culminates in the suppression of gonadotropin secretion. Specifically, this includes the inhibition of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) release from the anterior pituitary gland, thereby preventing the LH surge that is prerequisite for ovulation. At the system level, this leads to an anovulatory state.

Secondary effects include the modulation of cervical and endometrial tissue. Progestin receptor agonism induces changes in the cervical mucosa, resulting in increased viscosity which physically impedes sperm migration. Concurrently, the hormonal environment alters the endometrial architecture, rendering the uterine lining less receptive to the blastocyst.

Dosage and Administration Information

How to Use Mirvala 28

Mirvala 28 is an oral tablet taken daily in a specific sequence to complete a 28-day regimen. Following instructions exactly is essential for proper use. The tablet should be taken at approximately the same time every day.

Dosing and Sequence

Each pack contains 28 tablets: 21 active (hormone-containing) tablets and 7 inactive (non-hormone-containing) tablets. The daily dosing follows the sequence printed on the blister pack, starting with the active tablets and continuing through the inactive tablets.

Administration Scope Official Guideline
Route of Administration Oral
Dosing Schedule One tablet daily for 28 consecutive days
Timing in Relation to Meals May be taken with or without food

Starting and Missed Dose Rules

Use is initiated on a physician-determined schedule, either the first day of the menstrual period (Day 1 Start) or the first Sunday after the start of the period (Sunday Start). A new 28-day pack must be started immediately after finishing the last inactive tablet, with no break between packs.

Missed dose rules vary based on the number of tablets missed, but generally require taking the missed tablet immediately and continuing the remaining tablets at the usual time. If a dose of an active tablet is missed by 12 hours or more, specific protocols based on the week of the cycle must be followed.

Recent Clinical Evidence

Mirvala 28: Recent Clinical Evidence

Recent clinical research on combined oral contraceptives (COCs) containing ethinyl estradiol and desogestrel (such as Mirvala 28) focuses on refining understanding of their efficacy, non-contraceptive health effects, and safety profile in diverse populations.


Primary Efficacy Studies

Studies have consistently examined the contraceptive effectiveness of this formulation, typically measuring outcomes using the Pearl Index, which calculates the number of pregnancies per 100 woman-years of use. Research results generally report high effectiveness when the medication is taken strictly as directed.

Non-Contraceptive Outcomes Investigated

Trials have investigated secondary health parameters potentially influenced by this COC formulation. Key areas include:

  • Cycle Regulation: Studies have evaluated the influence on menstrual cycle regularity and reduction in menstrual blood flow volume, which may be relevant for managing heavy or unpredictable cycles.
  • Skin Changes: Research has examined the potential for these combined hormones to influence the appearance of mild-to-moderate acne in study participants.

Safety Profile Research Focus

Ongoing pharmacoepidemiological research continues to monitor and investigate the cardiovascular safety profile associated with third-generation COCs. Specifically, researchers have focused on comparing the risk profiles for venous thromboembolism (VTE) between different progestin components. These studies aim to characterize the incidence rates of VTE events in large, representative cohorts of users, providing data to inform risk assessments.

Frequently Asked Questions (FAQ)

Common questions about Mirvala 28 (FAQ)


Q: What are the non-contraceptive benefits of taking Mirvala 28?

A: According to official product information, this medication has been noted to be used for purposes beyond contraception, such as helping to regulate the menstrual cycle. Additionally, studies have examined the formulation's influence on the appearance of mild-to-moderate acne in users.

Q: Is Mirvala 28 commonly prescribed for acne or skin issues?

A: Research and official documents indicate that this specific formulation has been investigated regarding its influence on mild-to-moderate acne. This reflects a common area of study for combined oral contraceptives.

Q: Is it common for Mirvala 28 to be used for conditions other than pregnancy prevention?

A: Yes, official documents note that the medication may be used for conditions other than pregnancy prevention. For example, it has been associated with effects on menstrual cycle regulation.

Q: What is the difference between Mirvala 28 and Mirvala 21?

A: The difference lies in the regimen schedule. Mirvala 21 contains 21 hormone-containing tablets followed by a seven-day break. Mirvala 28 contains 21 active tablets followed by seven inactive, non-hormonal reminder tablets, meaning there is no break taken between packs.

Q: What is the purpose of the 7 inactive pills in the 28-day pack?

A: The 7 inactive pills do not contain hormones. According to the official product information, they are sometimes described as 'reminder' pills. They are understood to help maintain the daily routine of tablet-taking to ensure a continuous cycle without a non-pill break.

Q: What types of headaches are sometimes associated with taking Mirvala 28?

A: Official safety documents state that headache is a very common adverse reaction reported by users. The documents also note that migraine is listed as an uncommon adverse reaction associated with the use of this medication.

Q: Do hormonal contraceptives like Mirvala 28 affect the use of contact lenses?

A: Official patient safety information advises that if you experience changes in your vision or if your contact lenses begin to feel uncomfortable while using this medication, consultation with an eye care specialist is relevant.

Q: Is there a relationship between Mirvala 28 and changes in blood pressure?

A: Official safety documents indicate that high blood pressure may occur as a result of using this medication. For women with existing well-controlled hypertension, official information notes the relevance of monitoring blood pressure while using this contraceptive.

Q: What are the descriptive facts regarding Mirvala 28 and the risk of gallbladder issues?

A: Regulatory safety information indicates that the risk of developing gallbladder disease that may require surgery is higher in women who use combined oral contraceptives. The highest risk has been documented during the first year of use.

Q: Does Mirvala 28 have any known official association with the development of cancer?

A: Official documents describe a slight increased risk of cervical cancer associated with the use of this product. The documents also mention a rare risk of hepatic neoplasms (liver tumors), including benign hepatic adenomas and the extremely rare hepatocellular carcinoma.

Q: Are changes in cholesterol or triglyceride levels a possibility while on this medication?

A: Official safety documents note the possibility of adverse carbohydrate and lipid metabolic effects associated with using this medication. This includes the potential for changes in blood levels of triglycerides and cholesterol.

Q: Do common antibiotics typically reduce the effectiveness of Mirvala 28?

A: Official warnings advise that the effectiveness of the pill may be reduced by certain medications, which include some antibiotics. For these interactions, official information notes that the use of an additional, non-hormonal contraceptive method is a relevant consideration.

Q: Are there any known interactions between Mirvala 28 and pain relief medicines?

A: Official interaction databases list some common pain relief medicines as having a potential for minor interaction with the hormonal components. These interactions usually require observation or monitoring rather than complete avoidance.

Q: Does grapefruit or grapefruit juice interact with the active ingredients in the medication?

A: Official food interaction information states that consuming grapefruit juice may increase the blood levels of etonogestrel, which is the active form of the progestin in this medication.

Q: Do certain antifungal or antiviral medications interact with oral contraceptives?

A: Regulatory documents state that the product is contraindicated for use with certain Hepatitis C combination drug regimens. Additionally, some official sources advise that some azole antifungal agents may potentially increase the levels of the hormones in the blood.

Q: Can teenagers use Mirvala 28 for contraception?

A: Official documents state that the medication is indicated for use by females of reproductive potential to prevent pregnancy. Use is specifically not established in females before menarche (the first menstrual period).

Q: Is it safe to use Mirvala 28 if one has a history of depression?

A: Official safety documents list depression as a condition where information exchange with a healthcare provider is relevant. Furthermore, official information cautions users about the possibility of experiencing a worsening mood or feelings of depression while using this medication.

Q: Is there a known descriptive phenomenon called post-pill amenorrhea?

A: Official warnings state that amenorrhea (the absence of a period) or oligomenorrhea (infrequent periods) may occur after discontinuing the use of combination hormonal contraceptives. This is noted to be more likely if the condition was present before starting the medication.

Q: Can Mirvala 28 be used to safely skip or delay a period?

A: Official information describes the labeled regimen using all 28 tablets. However, the documents also note that the patient may not get their period each month while taking the medication.

Q: Does Mirvala 28 offer any protection against sexually transmitted infections (STIs)?

A: Official patient information clearly states that this medication does not protect against sexually transmitted infections (STIs), including HIV/AIDS. A barrier method is necessary for protection against STIs.

Q: Are there any reported instances where the drug was found to be ineffective as described in official reports?

A: Official reports have detailed rare instances of packaging or manufacturing errors where the tablets were packaged in the wrong sequence. This type of error can result in an increased risk of the pill being ineffective.

How should Mirvala 28 be stored and disposed of?

Mirvala 28 (desogestrel and ethinyl estradiol tablets) must be stored and handled according to official regulatory specifications to maintain its quality and efficacy. The medication must be kept at a Controlled Room Temperature, defined as between 15 C to 30 C (59 F to 86 F).

Storage Requirements

The tablets should be stored in a secure location, away from excessive heat, moisture, or direct sunlight, and must be kept from freezing. They must be stored in the original packaging and kept in a safe place out of the reach of children and pets.

Disposal Instructions

Any unused or expired Mirvala 28 must be disposed of in accordance with local regulations for pharmaceutical waste. Patients are often instructed to return such products to a pharmacy for proper disposal, ensuring the medicine is not introduced into the environment or wastewater.

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

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