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Diane-35 ED

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Diane-35 ED

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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

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Overview of Diane-35 ED

Property Description
Active ingredients Cyproterone acetate, Ethinyl Estradiol
Form Coated tablets (Oral)
Pharmacological class Combined Oral Contraceptive; Anti-androgen
Common use Hormonal regulation and contraception
Origin Synthetic steroid hormones

What Type of Medicine is Diane-35 ED?

Diane-35 ED is classified as a synthetic, combined oral hormonal preparation, belonging to the broad pharmacological class of Sex hormones and modulators of the genital system. This prescription-only medicine (Rx) is a fixed-dose combination product, administered orally as coated tablets for systemic effect. Its identity is anchored by the two active pharmaceutical ingredients: the synthetic estrogen Ethinyl Estradiol and the synthetic progestin Cyproterone acetate.

The medicine functions as a type of Combined Oral Contraceptive (COC). Its unique formulation is characterized by the specific inclusion of Cyproterone acetate. This composition distinguishes it from standard contraceptive pills where the progestin component lacks such a potent anti-androgenic effect. Analogous preparations sharing this dual component combination are also commercially available under different trade names, such as Dianette or Estelle-35, across various global markets.

Composition and Dual Purpose of Diane-35 ED

The combination of Cyproterone acetate and Ethinyl Estradiol results in a dual physiological action: it regulates hormonal cycles while specifically blocking the action of androgens (male hormones) in the body’s tissues. The Cyproterone acetate component acts as a strong androgen receptor antagonist.

The primary purpose of this medicine leverages the combined action of the two hormones to provide effective contraception. Furthermore, a key benefit is derived from the anti-androgenic property of the Cyproterone acetate, which gives the medicine a specialized mechanism for addressing hormone-sensitive issues typically faced by women of reproductive age. The ED (Every Day) suffix indicates that the pack includes inactive (placebo) tablets to maintain a consistent daily routine.

Regulatory References

  1. Summary of Product Characteristics (SmPC) for Diane-35
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What side effects are possible with Diane-35 ED?

Possible Side Effects and Safety Information

This section outlines the officially documented safety profile of Diane-35 ED, strictly based on authoritative government regulatory sources. It does not contain instructions for use, dosing, or therapeutic benefits.

Serious and Clinically Significant Risks

The most serious, though rare, documented risks involve the formation of blood clots (thromboembolism) in veins (Venous Thromboembolism, VTE) or arteries (Arterial Thromboembolism, ATE). These serious adverse reactions include:

  • Deep Vein Thrombosis (DVT)
  • Pulmonary Embolism (PE)
  • Myocardial Infarction (heart attack)
  • Stroke
  • Liver tumours (benign or malignant)

Exposure-Related Safety Patterns

The regulatory documents indicate that the highest risk of Venous Thromboembolism (VTE) occurs during the first year of use or upon restarting the medication after a break of at least one month.

Contraindications and Restrictions

The medicine is formally restricted from use (contraindicated) in individuals with specific pre-existing conditions that significantly increase the risk of serious side effects, including:

  • A history of VTE or ATE.
  • Known hereditary or acquired clotting disorders (e.g., Factor V Leiden).
  • Severe hepatic disease or liver tumours.
  • Uncontrolled hypertension or diabetes with vascular complications.
  • Migraine with focal neurological symptoms.
  • Concurrent use with any other hormonal contraceptive is strictly prohibited.

Common Adverse Reactions

Adverse events reported as common (affecting between 1 in 100 and 1 in 10 people) are generally categorized by the affected body system. These include:

  • Nervous system: Headache, migraine.
  • Psychiatric disorders: Mood changes, including depression.
  • Reproductive system: Breast pain or tenderness.
  • Gastrointestinal system: Nausea.
  • Metabolic changes: Changes in body weight.
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Overdose and Emergency Response

Overdose and when to seek help

The following information is strictly based on documented descriptions of overdose from government regulatory sources. Overdose with Diane-35 ED (Cyproterone acetate/Ethinyl Estradiol) is generally not expected to cause life-threatening symptoms, but any suspected ingestion of excessive doses requires immediate medical attention.

Documented Manifestations and Emergency Action

Acute ingestion of high doses may result in specific clinical manifestations, which primarily include nausea and vomiting (gastrointestinal disturbances). In females, vaginal bleeding, often referred to as withdrawal bleeding, is also documented as a possible presentation.

Regulatory authorities explicitly require that individuals seek immediate medical attention or contact a Poison Control Center when an overdose is suspected or confirmed. This action is mandated regardless of the severity of the initial symptoms.

Management and Antidote Status

There is no specific antidote known for overdose with this combination of active ingredients. Consequently, the management approach officially described in prescribing information is limited to providing symptomatic treatment and general supportive treatment to address the patient's clinical signs. The profile emphasizes that the treatment should address the patient's physical state rather than targeting the hormonal agents directly. Hospital monitoring may be required based on clinical assessment of the patient’s condition.

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Therapeutic Uses of Diane-35 ED

What Diane-35 ED Treats: Main Uses and Benefits

Diane-35 ED is commonly used across domains where additional symptomatic support is needed for symptoms related to systemic imbalance, and may also be part of symptomatic management for pregnancy prevention. It is applied in clinical settings that involve recurrent or episodic manifestations where chronic symptoms require a combined approach for sustained management. The core therapeutic domains are centered on specific dermatological and endocrine symptoms.

The medicine is relevant for easing symptoms of severe acne, hirsutism (unwanted hair growth), and associated seborrhoea (skin oiliness), and it may assist with symptoms related to cycle irregularities, which is considered relevant in conditions like Polycystic Ovary Syndrome (PCOS).

“This therapeutic approach generally helps ease the overall symptom burden and may contribute to improved day-to-day comfort during symptomatic periods.”

A common use case involves providing pregnancy prevention alongside the management of these androgenic symptoms.


Quick Fact: Relief for Androgen-Driven Symptoms The treatment is applied in situations where symptoms of severe acne and hirsutism are relevant in clinical settings when other treatments have not been successful, supporting patients who require long-term management of these distressing manifestations.

Regulatory References

  1. European Medicines Agency guidance
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Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Diane-35 ED

This section outlines the official rules defining patient eligibility for Diane-35 ED, based strictly on government-approved prescribing information.

Category Eligibility Rule
Allowed Population Strictly indicated for women of reproductive age (post-menarche) who require treatment for severe acne or hirsutism related to androgen sensitivity, only after alternative treatments (topical or systemic antibiotics) have failed.
Use Restriction Must not be used solely for contraception. Concomitant use with any other hormonal contraceptive is strictly prohibited.
Contraindicated (Vascular) History or presence of Venous or Arterial Thromboembolism (VTE/ATE, e.g., DVT, stroke, MI), including a known hereditary or acquired thrombotic predisposition. Migraine with focal neurological symptoms is also an absolute contraindication.
Contraindicated (Organ/Other) Severe hepatic disease or liver tumours. Known or suspected sex-steroid influenced malignancies. Undiagnosed vaginal bleeding.
Contraindicated (Life Stage) Pregnancy and Lactation are absolute contraindications. Use is not indicated after menopause.

The official profile strictly limits use to the therapeutic need for androgenic symptoms combined with the need for contraception. The absolute contraindications, spanning vascular risk, severe organ impairment, and malignancy, enforce that this medicine must not be used if a patient presents with any defined high-risk factor. Eligibility is further restricted by the need to discontinue use at least four weeks before major surgery or anticipated prolonged immobilisation.

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What should I know about interactions with other medicines?

Interactions with other medicines and products

Diane-35 ED is officially documented to interact with specific medicinal products, supplements, and substance classes, as outlined in government regulatory labeling. All interaction information is presented at a high, regulatory-aligned descriptive level.

Formal Prohibitions and Contraindicated Combinations

The co-administration of Diane-35 ED is strictly prohibited with other hormonal contraceptives. This restriction prevents hormonal overdose and duplication of effect. A formal contraindication also applies to certain Direct-Acting Antivirals (DAAs) used for Hepatitis C, such as combinations containing Ombitasvir, Paritaprevir, Ritonavir, or Dasabuvir. This prohibition is due to the documented risk of liver enzyme (ALT) elevation.

Exposure-Altering Drug Interactions

The efficacy of Diane-35 ED may be reduced when co-administered with hepatic enzyme inducers. These substances, including the anti-tuberculosis agent Rifampicin and certain anticonvulsants (e.g., Phenytoin, Carbamazepine), accelerate the breakdown of the hormones, decreasing their plasma concentration. The herbal product St. John's Wort is similarly classified as an enzyme inducer that reduces hormonal exposure.

Conversely, the hormonal components can affect the clearance of other medicines. The medicine is documented to increase the plasma concentration of drugs like corticosteroids and Cyclosporine, while it is documented to reduce the plasma concentration of Lamotrigine. Regulatory information states that the interaction with enzyme inducers requires consideration for 28 days after the inducing substance is stopped.

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Mechanism of Action

Androgen Receptor Blockade

Diane-35 ED contains cyproterone acetate, a synthetic steroid that functions as an antiandrogen. This component exerts its effect primarily by acting as an antagonist at the androgen receptors in target tissues (like the skin). This receptor-mediated signaling blockade prevents natural androgens, such as testosterone and dihydrotestosterone (DHT), from binding and initiating their downstream effects, thereby influencing target cell response to androgen signaling.


Modulation of Gonadotropin Secretion

Both active ingredients contribute to regulating the hypothalamic-pituitary-ovarian (HPO) axis. Cyproterone acetate exhibits antigonadotrophic and progestogenic activity, and ethinylestradiol is an estrogen agonist. Together, they create a negative feedback effect on the pituitary gland, suppressing the secretion of gonadotropins like Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH). This suppresses signaling sequences that typically lead to ovarian androgen production, resulting in feedback-mediated adjustment within the reproductive endocrine pathways.


Increased Sex Hormone Binding Globulin (SHBG)

The ethinylestradiol component dramatically increases the hepatic synthesis of Sex Hormone Binding Globulin (SHBG), a key transport protein. A rise in SHBG leads to more testosterone and other androgens being bound in the bloodstream. This modifies early molecular steps by reducing the concentration of free circulating plasma androgens, which are the biologically active fraction. This ultimately reduces the effective concentration of free androgens by limiting the availability of mediators at their target sites.

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Dosage and Administration Information

Diane-35 ED is an oral medication that must be taken strictly according to the 28-day regimen. It must not be used concurrently with any other hormonal contraceptive.

Dosage and Administration Schedule

Instruction Category Administration Rule
Route & Dose One tablet daily, taken orally with liquid.
Timing Take the tablet at about the same time every day.
Cycle Continuous 28-day tablet-taking; 21 beige (active) tablets followed by 7 white (inactive/placebo) tablets, strictly following the arrows on the pack.
Starting the First Pack Begin the first active tablet on Day 1 of the menstrual cycle (the first day of bleeding).

Missed Tablet Protocol (Active Tablets)

If an active (beige) tablet is missed by less than 12 hours of the usual time, the missed tablet should be taken immediately, and the next tablet should be taken at the regular time. No additional contraceptive precautions are required. If an active tablet is missed by 12 hours or more, the last missed tablet must be taken immediately (even if it means taking two tablets in one day), and the next tablets should be taken at the usual time. In this case, additional non-hormonal barrier contraception must be used for the next seven days.

Duration and Discontinuation

Treatment is generally continued for several months. It is typically recommended to continue for at least three to four cycles after the symptoms have completely subsided. The use of this medicine is indicated only after menarche, and it is not intended for use after menopause.

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Recent Clinical Evidence

Recent Clinical Evidence

Core Research Focus

Clinical studies have primarily investigated the use of the cyproterone acetate/ethinyl estradiol combination for treating moderate to severe acne and hirsutism (excessive hair growth) in women of reproductive age. This treatment is generally evaluated for patients who have not achieved satisfactory results with standard local therapies or oral antibiotics alone.

Research explores the combination's influence on symptoms associated with androgen sensitivity, often linked to conditions like Polycystic Ovary Syndrome (PCOS). The available data supports the role of the drug in managing these symptoms.


Symptom Resolution and Duration

Studies consistently report a reduction in the severity of both acne and hirsutism. However, the time required to observe changes differs by symptom:

Symptom Timeframe for Change Research Finding
Acne Often seen within 3 to 6 cycles Significant reduction in lesion counts reported in multiple trials.
Hirsutism Requires longer treatment, up to 12 months or more Studies indicate that therapeutic response typically requires a long-term approach.

Some research suggests that discontinuing treatment, even after satisfactory resolution of symptoms, may be followed by the reappearance of hirsutism and acne symptoms in a significant number of patients, indicating a need for prolonged management.


Safety Profile and Risk Considerations

Regulatory reviews, such as those conducted by the European Medicines Agency (EMA), have confirmed the low, known risk of venous thromboembolism (VTE) associated with this combination. Observational studies suggest that the risk of VTE with cyproterone acetate/ethinyl estradiol may be 1.5 to 2 times higher compared to combined oral contraceptives containing levonorgestrel.

To minimize this recognized risk, measures are employed to ensure the medicine is used only in the indicated patient groups and that the risks are clearly discussed with prescribers and patients.

Key Studies & References

  1. Evaluation of Risk-Minimization Activities for Cyproterone Acetate 2 mg/Ethinylestradiol 35 µg: A Cross-Sectional Physician Survey
  2. Diane-35 Product Monograph/Summary of Product Characteristics (Example: Bayer/National Agency Datasheet)
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Frequently Asked Questions (FAQ)

Common questions about Diane-35 ED (FAQ)

Q: What specific risk factors increase a patient's chance of developing a blood clot while on Diane-35 ED?

A: Official product information indicates that known risk factors for developing venous blood clots (VTE) include increasing age, obesity (BMI over 30 kg/m^2), a positive family history of VTE in a close relative, and periods of prolonged immobilisation. Risk factors for arterial blood clots include smoking and high blood pressure (hypertension). These factors, along with others, are relevant to the overall risk assessment.

Q: What are the general expectations for weight changes or fluid retention while on this medicine?

A: Regulatory documents state that weight increase is a common adverse reaction that has been reported by patients. Fluid retention is also a documented adverse reaction associated with the hormonal components of this medicine. Reporting any significant or bothersome changes to a healthcare professional is consistent with patient safety guidelines.

Q: What is the recommended maximum duration for continuous treatment with Diane-35 ED?

A: Official guidelines state that treatment should be evaluated periodically by the treating physician. It is typically recommended to continue the medicine for at least three to four cycles after the treated symptoms (severe acne or hirsutism) have subsided. No specific absolute maximum duration is mandated in the regulatory documents.

Q: How is Diane-35 ED thought to help with symptoms of Polycystic Ovary Syndrome (PCOS)?

A: The medicine is formally indicated for the treatment of conditions related to androgen-sensitivity (such as severe acne and hirsutism). Symptoms associated with excess androgens are often linked to Polycystic Ovary Syndrome (PCOS). The strong anti-androgen component works to manage these specific symptoms in women who require both treatment and contraception.

Q: What is hirsutism, and how does this medicine address the condition?

A: Hirsutism is the medical term for excessive hair growth in women, often resulting from high androgen levels. The medicine addresses this by using the anti-androgen component, cyproterone acetate, and by increasing SHBG (Sex Hormone Binding Globulin). This action blocks male hormones from binding to receptors and reduces the level of active male hormones circulating in the bloodstream.

Q: Is it possible for Diane-35 ED to be resumed if the condition returns after a long break?

A: Treatment can be resumed if the original androgenic symptoms, such as acne or hirsutism, return after stopping. However, regulatory warnings note that when restarting after a break of four weeks or more, the increased risk of venous thromboembolism is a significant factor in any decision to restart treatment.

Q: What is the meaning of 'withdrawal bleeding' that occurs during the pill-free interval?

A: Withdrawal bleeding is the bleeding that typically occurs when a woman stops taking the active hormone tablets and begins the seven-day inactive (placebo) tablet phase. This bleeding is not a true menstrual period but is caused by the temporary withdrawal of hormones. Official protocol specifies that if this expected bleeding fails to occur, pregnancy status should be checked prior to initiating the next cycle.

Q: Are there any contraindications related to age and smoking status for taking Diane-35 ED?

A: Yes, official product information states that the medicine is contraindicated (should not be used) in women who smoke and are over the age of 35. This is due to a significantly increased risk of serious cardiovascular events, such as heart attack or stroke.

Q: Is it common to experience spotting or bleeding between periods (breakthrough bleeding) when starting Diane-35 ED?

A: Irregular bleeding or amenorrhea (no bleeding) are known adverse reactions that may occur, particularly when first starting. If unexpected bleeding, often called spotting or breakthrough bleeding, is persistent or heavy, the cause is generally recommended to be evaluated by a healthcare professional.

Q: How long do common initial side effects, like nausea or breast tenderness, typically last?

A: While the regulatory documents list common effects, they do not specify the exact duration. According to general clinical guidance, if common side effects continue after the first three packs of treatment, the issue should be addressed with a healthcare professional for guidance on next steps.

Q: Is the contraceptive effect of Diane-35 ED immediately effective from the first tablet?

A: No, the contraceptive effect is not immediate. Official guidance indicates that to build up adequate contraceptive protection and fully suppress the hormonal system, it is necessary to take the active tablets for 7 consecutive days starting on the first day of the menstrual cycle.

Q: What is the failure rate for contraception when Diane-35 ED is used as directed?

A: Although the specific failure rate is not listed on the product label, the risk for combined oral contraceptives (COCs) used with perfect consistency is approximately 0.3% annually. The failure rate increases when the tablets are not taken perfectly, which is referred to as typical use.

Q: Do antibiotics reduce the effectiveness or increase the risks of Diane-35 ED?

A: Regulatory clinical guidance indicates that non-enzyme-inducing antibiotics are generally not established to reduce contraceptive effectiveness. However, if a patient experiences vomiting or severe diarrhoea while taking any antibiotic, compliance with the specific missed tablet rules is crucial for maintaining protection.

Q: Is there a link between Diane-35 ED use and the risk of certain cancers, such as breast or cervical cancer?

A: Studies and official information state that taking the medicine is associated with a slightly increased risk of cervical cancer and a slightly increased risk of breast cancer. This risk often starts to diminish over time after the patient stops taking the treatment.

Q: Can Diane-35 ED affect the results of certain laboratory tests, such as blood sugar or thyroid tests?

A: Yes, official product information notes that the medicine can cause a change in lipid metabolism, including an increase in plasma lipoproteins. Healthcare professionals need to be aware of these potential effects when interpreting laboratory results.

Q: Does the medicine offer any protection against sexually transmitted infections (STIs)?

A: No, official patient information explicitly states that Diane-35 ED will not protect against HIV/AIDS or any other sexually transmitted infections (STIs). A non-hormonal barrier method, such as a condom, provides necessary protection against STIs.

Q: What is the difference in how Diane-35 ED works compared to a progestogen-only pill?

A: Diane-35 ED is classified as a combined pill because it contains both an estrogen (Ethinyl Estradiol) and a potent progestin/anti-androgen (Cyproterone acetate). Progestogen-only pills, by contrast, contain only a progestin and may work primarily by thickening cervical mucus.

Q: Can Diane-35 ED be used to treat hair loss (androgenetic alopecia)?

A: According to the official regulatory profile, the medicine is indicated for the treatment of hirsutism (excessive hair growth) and severe acne. Androgenetic alopecia (hair loss) is not listed as an approved indication in the product information.

Q: What are the signs of a severe allergic reaction to the active ingredients in Diane-35 ED?

A: Official safety documents list signs of a severe allergic reaction (angio-oedema). These signs, which include swollen face, tongue, and/or throat, or hives together with difficulty breathing, are recognized indicators for seeking immediate medical review.

Q: Are there any known long-term side effects that may persist after a patient discontinues Diane-35 ED?

A: Follow-up studies have observed certain conditions that may persist in some patients after they stop therapy. These can include weight gain, headache, gastrointestinal disorders, and changes in mood. Regulatory documentation emphasizes that treated symptoms (acne/hirsutism) may recur.

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How should Diane-35 ED be stored and disposed of?

Storage and Disposal of Diane-35 ED

The storage and disposal of Diane-35 ED must follow official regulatory requirements to maintain product stability and ensure public safety.


Storage Requirements

Requirement Condition
Temperature Store at a temperature below 30°C.
Protection Keep protected from both light and moisture.
Packaging Must remain in the original container/pack.

Handling and Disposal

To prevent accidental exposure, the medicine must be stored out of the sight and reach of children.

Expired or unused Diane-35 ED must be disposed of according to local regulations. Do not discard the tablets into wastewater or household rubbish. The product should be returned to a pharmacist or an approved collection point for appropriate pharmaceutical waste handling.

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

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