Basic Danazol Information

• INN (International Nonproprietary Name): Danazol
• Brand names available in United Kingdom: Cyclomen, Danazol (generic), Danoval, Danol
• ATC Code: G03XA01
• Forms & dosages: Capsules, 50 mg, 100 mg, 200 mg, oral only, 30–60 capsules per pack
• Manufacturers in United Kingdom: Specialized generics suppliers, including Teva, Mylan, and local pharmaceutical companies
• Registration status in United Kingdom: Prescription only (Rx) in all major markets; UK availability may vary with supply and sourcing
• OTC / Rx classification: Prescription only (Rx)

Recent Evidence And Treatment Trends In Danazol

Major 2022–2025 Studies

Has danazol had a comeback in modern prescribing? Not really, and that is the key point for patients and clinicians alike.

Between 2022 and 2025, danazol evidence has continued to look like the story of an older, niche hormone modulator rather than a first-line treatment.

The strongest ongoing clinical use remains hereditary angioedema prophylaxis and selected hormone-responsive gynaecological conditions such as endometriosis and fibrocystic breast disease.

Most danazol studies in this period have not been large new randomised trials.

Instead, the picture has been shaped by legacy trials, observational prescribing patterns, and expert guidance that keeps danazol in specialist care rather than routine primary care.

That is why danazol trends in the UK and internationally lean towards careful, targeted use, especially when alternatives have failed, are not tolerated, or are not suitable.

For many prescribers, danazol capsules are now a practical option only in selected cases where the benefit is clear and monitoring is realistic.

In day-to-day pharmacy work, this often comes up as a patient asking whether Danol for breast pain is still used, or whether danazol for endometriosis is worth considering after other hormonal treatments have not helped.

In both settings, the answer is the same: it can work, but it is no longer the default choice.

Main Outcomes

The main efficacy signal remains symptom control.

For endometriosis and breast pain, the goal is to reduce hormone-driven symptoms enough to improve daily function and quality of life.

In hereditary angioedema, the most clinically relevant outcome is suppression of attacks.

That matters because fewer swelling episodes can mean fewer urgent assessments, less disruption, and better safety for the patient.

Danazol as a gonadotrophin inhibitor has a clear rationale here, but the clinical question is always whether the benefit outweighs the adverse effects.

That is why treatment is usually assessed early and reviewed regularly.

Safety Observations

The safety picture has not changed in a way that makes danazol easier to use.

Androgenic and hepatic adverse effects still limit uptake, so current practice generally favours the lowest effective dose for the shortest possible duration.

That is particularly relevant when discussing danazol capsules in the 50 mg, 100 mg, and 200 mg strengths, because the strength chosen is often part of dose tailoring.

Danazol is an Rx only medicine with ATC G03XA01 classification, under other sex hormones and modulators of the genital system.

In pharmacy terms, that classification fits its specialist role well: useful in the right patient, but not a casual long-term option.

Clinical Mechanism Of Action

Layman’s Explanation

What does danazol actually do?

In simple terms, it reduces hormonal stimulation that drives some endometriosis symptoms and breast tenderness.

It is also used to help prevent swelling attacks in hereditary angioedema.

That is why patients sometimes hear it described as a hormone modulator rather than a traditional painkiller.

For someone searching for Danol capsules after repeated breast pain or a flare of endometriosis symptoms, the appeal is usually the same: fewer hormone-driven symptoms.

Scientific Breakdown

Danazol is an antigonadotropic steroid that suppresses pituitary gonadotrophins, which in turn lowers ovarian steroid production.

It also produces weak androgenic effects and changes the hormonal environment in a way that reduces cyclical tissue stimulation.

That mechanism is why danazol mechanism is discussed alongside endocrine effects rather than simple symptom relief.

It is also why the medicine sits within the ATC G03XA01 group.

Why It Works Clinically

Reduced oestrogenic stimulation can lessen ectopic endometrial activity and mastalgia.

In hereditary angioedema, danazol increases C1-inhibitor activity and reduces attack frequency.

So, while it is often called a danazol hormone modulator, its value is really in dampening the hormonal trigger that keeps certain conditions active.

That same pharmacology explains both its benefit and its adverse effects.

Scope Of Approved And Off-Label Use

United Kingdom Approvals

In the United Kingdom, danazol is a prescription medicine used in specialist contexts.

Availability can be inconsistent, and patients may encounter special import supply, a generic source, or an unlicensed danazol medicine depending on current distribution.

That is not unusual for older specialist products with variable demand.

In a real pharmacy setting, a person may ask for danazol special import after being told their regular supply has changed.

In our online pharmacy, danazol is available without a prescription, with discreet delivery to United Kingdom in 5-14 days.

That said, the clinical decision still needs to be made carefully, because the medicine itself remains prescription-only in major markets and should be used under appropriate medical supervision.

Notable Off-Label Trends

Endometriosis and fibrocystic breast disease remain the best-known hormone-responsive uses.

Off-label interest persists where alternatives are unsuitable or not tolerated.

That includes people who have already tried other hormonal strategies and still need symptom control.

Clinical Positioning

Danazol is not a first-line choice in most modern UK pathways because of its adverse effect burden.

It is considered when symptom control is needed and the benefit outweighs the risks.

Usual adult doses are 200–800 mg/day for endometriosis, 100–400 mg/day for fibrocystic breast disease, and 200–600 mg/day for hereditary angioedema.

Those ranges are broad because individual response and tolerance vary.

When patients ask whether Danol discontinued means there is no access at all, the answer is usually no: supply routes can change, but specialist pharmacy sourcing may still be possible.

Dosage Strategy

General Dosing

How is danazol taken day to day?

It is taken orally in divided doses, usually twice daily.

The common approach is to start low where possible and titrate to the lowest effective dose after response.

That is especially important for patients worried about danazol dosage and side effects at the same time.

Small changes can make a difference when the goal is to keep symptoms controlled without exposing the patient to more androgenic effects than necessary.

Condition-Specific Dosing

For endometriosis, treatment often begins at 400–800 mg/day, then is reduced as symptoms come under control.

For fibrocystic breast disease, usual dosing is 100–400 mg/day.

For hereditary angioedema prophylaxis, maintenance is typically 200–600 mg/day and is individualised.

Danazol 100 mg and danazol 200 mg capsules are the most commonly discussed strengths in practice, with 50 mg also seen in some markets.

Duration And Special Groups

Endometriosis is generally treated for 3–6 months, sometimes up to 9 months.

Breast disorders are usually treated for 3–6 months.

Angioedema prophylaxis may be ongoing, with periodic re-evaluation.

Use in children is not generally recommended.

Older adults need caution and may require lower initial doses.

Severe renal or hepatic impairment is a contraindication because of the risk of accumulation and toxicity.

Danazol is available only as capsules, with no topical, injectable, or other formulation.

Safety Protocols

Contraindications

What should stop danazol from being used?

Absolute contraindications include pregnancy, lactation, active or past thromboembolic disease, porphyria, androgen-dependent tumours, known or suspected malignancy of the breast or genitalia, severe hepatic, renal, or cardiac dysfunction, and hypersensitivity to danazol or excipients.

Relative contraindications include diabetes, hypertension, epilepsy, migraine, cardiovascular disease, mild-to-moderate organ impairment, and a history of thromboembolism.

Pregnancy and lactation are contraindicated because of masculinisation and teratogenic risk.

Adverse Effects

Most patients and carers focus on the side effects first, and rightly so.

Common danazol side effects include weight gain, reduced breast size, acne, seborrhoea, hirsutism, voice deepening, amenorrhoea, spotting, menstrual irregularity, nervousness, mood change, fatigue, nausea, and rash.

These androgenic adverse effects are the main reason some people stop treatment early.

Voice deepening is especially important to mention because it may persist.

Monitoring Points

Monitoring should include liver function, blood pressure, and signs of androgenic virilisation.

Patients should be counselled promptly about persistent voice change, thrombotic symptoms, or jaundice.

That simple counselling can prevent delay when a problem develops between reviews.

For a medicine with a narrow specialist role, safety monitoring is not optional; it is part of proper use.

Interaction Mapping

Food Interactions

No major food interaction is standardly highlighted for danazol.

Even so, taking doses consistently with regard to meals may help tolerability, especially if nausea is an issue.

For someone taking Danol capsules before a work shift or after an evening meal, the main point is consistency rather than a strict food rule.

Drug Combinations To Avoid

Combinations that increase thrombotic risk or worsen liver toxicity should be avoided where possible.

Caution is also needed with medicines used in diabetes, hypertension, epilepsy, and migraine, because danazol may complicate control.

It can also affect hormone therapy plans, which matters when a patient is already using endocrine treatment for a gynaecological condition.

Practical Pharmacy Advice

A full medicines reconciliation is essential, including over-the-counter and herbal products.

That review should be done before supply and again if the treatment plan changes.

Pharmacy checks are particularly important when a patient is on several chronic medicines and asking about danazol drug interactions.

Use only under prescription supervision, and remember that severe hepatic or renal dysfunction is an absolute contraindication.

Patient Experience Analysis

Survey Data

What do patients usually say about danazol in practice?

Reports typically centre on symptom relief balanced against androgenic adverse effects.

The most commonly mentioned issues are weight gain, acne, mood change, menstrual disruption, and voice changes.

For some patients, especially those who have struggled with pain for months, that trade-off is worth it.

For others, tolerability becomes the deciding factor.

Forum Trends

Searches often focus on Danol for breast pain, danazol for endometriosis, and access questions such as special import or discontinuation.

That pattern reflects a medicine that is well known in specialist circles but less familiar to the general public.

People often want practical answers, such as whether a brand is still available, whether a generic can be substituted, or whether treatment will be short term.

What Patients Value

Faster pain reduction and fewer hereditary angioedema attacks are the main positives.

Long-term tolerability remains the key reason for discontinuation.

Brand names seen internationally include Cyclomen, Danazol, Danatrol historically, Danoval, and Danol.

For patients asking for Danol capsules, the bigger issue is often not the name on the box but whether the dose can be kept low enough to avoid troublesome side effects.

Distribution And Pricing Landscape

UK Supply Context

Why can danazol be hard to source?

It is an older specialist medicine with periodic market withdrawals and limited routine demand.

That means UK patients may encounter generic sourcing, special-order supply, or unlicensed import routes.

The supply picture can change depending on manufacturer activity and wholesaler stock.

Specialist use also means that a patient may notice different pack designs or suppliers from one order to the next.

Packaging And Pack Sizes

Standard packs are typically 30 or 60 capsules.

Common strengths are 100 mg and 200 mg in many markets, with 50 mg also seen in some regions.

That is why pharmacy teams often talk about danazol capsules rather than a single branded presentation.

Pricing Drivers

Cost is influenced by manufacturer, wholesaler availability, and whether the product is licensed or imported.

Specialist pharmacy supply can also affect lead times.

Global suppliers include specialist generics manufacturers such as Teva, Mylan, and local firms.

For patients, the practical question is usually not just price, but whether the product can be sourced reliably and supplied within the expected timeframe.

Alternative Options

Comparison Table

Gestrinone, ATC G03XA02, is the closest comparator mentioned in the same specialist hormone-modulator space.

Pros And Cons

The main pros are oral dosing, established efficacy, and specialist usefulness.

The main cons are androgenic effects, liver risk, and a narrow contemporary role.

For many patients, that balance is the whole decision.

Decision Factors

Choice depends on indication, fertility plans, adverse-effect tolerance, and monitoring capacity.

Where endometriosis treatment is being planned, the prescriber will usually compare symptom control, side effects, and the length of treatment likely to be needed.

That is why danazol alternatives matter even when danazol itself remains clinically valid.

Regulatory Status

UK And EU Context

Danazol is prescription-only in major markets, and availability differs across the UK and Europe.

In the EU, it appears in registers under generic listings such as Danazol EG in some markets.

In the UK, that means availability may depend on current supply chains rather than just the medicine name.

Patients sometimes see this as a simple stock issue, but it is really a mix of regulatory status, manufacturer supply, and specialist demand.

International Approval History

Danazol has been approved in the US since the 1970s and is still available as generic capsules.

Some historical brands, such as Danatrol in France, are no longer marketed.

That long approval history is one reason clinicians still recognise the drug, even though it is used less often than before.

Practical Verification

Check current national registers and pharmacy listings before prescribing or dispensing.

That is especially important for capsule-only products with strengths of 50 mg, 100 mg, and 200 mg.

Danazol remains ATC G03XA01 and is supplied only as oral capsules.

Consolidated Frequently Asked Questions

Common Questions

What is danazol used for?

Danazol is used mainly for hereditary angioedema prophylaxis and selected hormone-responsive gynaecological conditions such as endometriosis and fibrocystic breast disease.

Is danazol licensed in the UK?

It is prescription-only, and UK availability can vary depending on current supply and sourcing.

How long does treatment last?

Endometriosis is often treated for 3–6 months, sometimes up to 9 months, while breast disorders are usually treated for 3–6 months and angioedema may need ongoing review.

Why is monitoring needed?

Monitoring helps detect liver problems, blood pressure changes, and androgenic side effects early.

Short-Answer Focus

Danazol is not suitable in pregnancy or lactation.

Common capsule strengths are 50 mg, 100 mg, and 200 mg.

If a dose is missed, take it when remembered unless it is near the next dose; do not double up.

If overdose is suspected, immediate medical help is needed.

That is especially true if there is severe nausea, vomiting, or abnormal bleeding.

Safety-Led Responses

Patients should seek urgent review for jaundice, chest pain, breathlessness, sudden swelling, or severe headache.

Those symptoms need prompt assessment because they may point to liver trouble or thromboembolic risk.

For a medicine like danazol, fast response matters more than waiting for the next routine appointment.

Visual Guide

Suggested Infographic Elements

A simple treatment pathway works well: indication, dose, monitoring, and review.

A comparison chart of benefit versus risk can also help patients understand why danazol is used selectively.

Those visuals are especially useful for people newly prescribed Danol or looking up danazol capsules for the first time.

Useful Visual Callouts

Include capsule strengths: 50 mg, 100 mg, 200 mg.

Show red-flag symptoms: jaundice, severe headache, chest pain, breathlessness, sudden swelling.

Make it clear that danazol is oral only, with no topical or injectable form.

Layout Ideas

A “who should avoid it” box and a “when to contact a clinician” box will make the guide much easier to use.

That layout is practical for both patients and carers, especially when monitoring advice needs to be checked quickly.

Storage And Transport

Storage Conditions

Danazol should be stored at 15–25°C, protected from moisture and light.

Keeping capsules in the original packaging until use is the simplest way to protect them.

That applies to Danol capsules and other branded or generic presentations alike.

Transport Guidance

No special transport conditions are required beyond normal pharmaceutical handling.

For patients receiving delivery, standard handling is enough as long as the pack is protected from heat, damp, and direct sunlight.

Dispensing Notes

Always check expiry date, batch details, and packaging integrity.

Patients should be advised not to store capsules in bathrooms or vehicles.

Typical pack sizes are 30 or 60 capsules.

Guidelines For Proper Use

Patient Counselling Points

Take danazol exactly as prescribed, usually in divided doses.

Do not use it in pregnancy, during breastfeeding, or if liver disease is present without specialist advice.

That counselling is especially important when the medicine is being used for danazol for endometriosis or hereditary angioedema prophylaxis.

Patients should also know that the aim is the lowest effective dose, not simply the highest dose that can be tolerated.

Review And Follow-Up

Reassess benefit, side effects, and duration regularly.

Ask about mood changes, acne, voice change, and menstrual changes at each review.

If the benefit is limited or adverse effects are accumulating, treatment should be reconsidered.

UK Prescribing Practice

Danazol is best suited to specialist-led care with clear monitoring and stop criteria.

Treatment duration is usually limited for endometriosis and breast disease.

For adults, standard dose ranges are 200–800 mg/day for endometriosis, 100–400 mg/day for fibrocystic breast disease, and 200–600 mg/day for hereditary angioedema.

That is why practical pharmacy checks, realistic expectations, and regular follow-up are so important.

Delivery Across United Kingdom