Danatrol

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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 Danatrol

What is Danatrol? Defining the Medicine's Identity

Property Description
Active ingredient Danazol (INN)
Form Capsule
Pharmacological class Attenuated androgen, Gonadotropin inhibitor
General purpose To reduce the influence of female hormones (estrogen)
Origin Synthetic steroid derivative (Ethisterone)

What is the Drug Danatrol and Its Active Ingredient?

Danatrol is a commercial name for the medication containing the active compound Danazol. This preparation is a single-ingredient product, which is administered orally in a capsule form, distinguishing it as a systemic treatment. The substance Danazol is manufactured chemically, placing it in the category of synthetic hormone compounds. Its status as a prescription-only medication further highlights its targeted action and the necessity of medical supervision.

Danazol’s Pharmacological Class and Origin

Danazol is officially classified as an antigonadotropin, reflecting its ability to suppress hormonal signals. Furthermore, it is categorized as an attenuated androgen because its structure, derived from the synthetic steroid ethisterone, grants it weak hormonal activity similar to male hormones. Its efficacy is clinically recognized for managing conditions where reducing the body's natural output of female hormones is the primary therapeutic strategy. This specialized dual classification allows the medicine to interfere with central reproductive pathways, which is the foundation of its therapeutic utility.

What is the General Therapeutic Purpose of Danatrol?

The general function of Danazol is to create a systemic state of hypoestrogenism, which translates to a controlled reduction in the body’s overall estrogen levels. By inhibiting the signals that regulate the ovaries, the drug is utilized to manage specific physiological conditions that are intensified by or dependent upon high levels of endogenous female hormones. The documentation of its pharmacological action confirms the medication's primary role is achieved through this targeted hormonal adjustment. This action demonstrates that the medicine is utilized specifically to achieve a temporary hormonal shift designed to alleviate symptoms.

Regulatory References

  1. NIH StatPearls Article on Danazol
  2. NCI Drug Dictionary Definition

What side effects are possible with Danatrol?

Possible Side Effects and Safety Information

The officially documented safety profile for Danazol is primarily defined by high-frequency hormonal effects and the potential for rare, serious systemic reactions, as outlined in regulatory documents.

Adverse Reactions and Frequencies

Adverse reactions are classified by frequency according to regulatory standards:

  • Common (1% to 10%): These effects are frequently reported and often relate to the medication’s attenuated androgenic activity. They include weight gain, acne, seborrhea, hirsutism, headache, emotional lability, fluid retention, flushing, and changes to the menstrual cycle, such as amenorrhea or spotting.
  • Rare (0.01% to 0.1%): Less frequent but serious reactions include thromboembolic events (arterial and venous thrombosis), hepatic adenoma, and benign intracranial hypertension.

System-Organ-Classes and Serious Risks

Regulatory agencies group side effects by the physiological system affected, including Endocrine System Disorders, Hepatobiliary Disorders, Vascular Disorders, Skin and Subcutaneous Tissue Disorders, and Nervous System Disorders.

Serious adverse reactions documented in official labeling include peliosis hepatis (a rare form of liver toxicity) and potentially life-threatening strokes or pulmonary embolism.

Population and Duration Safety Constraints

Safety guidelines establish specific constraints for use:

  • Contraindications: The medicine is contraindicated during pregnancy due to the risk of virilization of the female fetus and is also contraindicated in individuals with marked impairment of hepatic, renal, or cardiac function, a history of thrombosis, or porphyria.
  • Time-Related Patterns: Serious hepatic complications are associated with long-term use. Conversely, certain physical changes, such as voice change and clitoral hypertrophy, may persist after cessation of therapy, although hepatic enzyme elevations are often reversible.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Danatrol (Danazol) overexposure establishes a low acute toxicity potential. As a result, official prescribing information typically does not detail a specific cluster of immediate symptoms or unique physiological effects that constitute an acute overdose presentation. This absence of specific acute manifestations shifts the regulatory focus to mandated emergency response and procedural management.

In any instance of suspected overexposure, immediate medical attention must be sought. Official documentation requires contacting a poison control center for guidance. The prompt activation of emergency medical services is mandated if the affected individual displays recognized signs of severe clinical deterioration. These critical triggers include when the person has collapsed, experiences trouble breathing, has a seizure, or cannot be awakened.

Management is strictly defined by the fact that no specific antidote is known for Danazol overexposure. The officially recommended intervention is limited to providing symptomatic and supportive treatment. This standard procedural care approach ensures that the individual receives necessary attention and observation, indicating that hospital monitoring may be required until clinical stability is secured. No specific population-based differences in acute overdose severity are formally documented in the official labeling.

Therapeutic Uses of Danatrol

Danatrol (Danazol) is commonly used in situations involving certain distressing symptoms to address several chronic conditions. It is relevant for easing symptomatic distress across domains involving certain distressing symptoms, including those sensitive to hormones and immunological defects. This medication is applied in managing these conditions.

This medication is generally applied across three core therapeutic areas: managing hormonal gynecological disorders such as endometriosis and severe fibrocystic breast disease; providing long-term prophylaxis for severe recurrent swelling (hereditary angioedema); and offering supportive care for chronic blood component deficiencies like Immune Thrombocytopenia. It helps address symptom clusters related to physical discomfort, episodic changes, and systemic imbalance. The benefit contributes to easing the overall symptom load and may help patients cope more steadily with symptom fluctuations.

“The therapeutic benefit may assist with maintaining functional stability by addressing the growth of abnormal tissue.”

Applied in clinical settings where additional symptomatic support is needed, Danatrol is commonly used to help with symptoms that create noticeable physiological strain, offering support during difficult episodes.

Quick Fact: Relief for Hormonally-Driven Pain
Symptom Focus: Chronic pelvic pain, breast tenderness, and nodularity.
Benefit: Contributes to improved comfort during symptomatic periods.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Who Can and Cannot Use Danatrol?

Danatrol (Danazol) eligibility is defined by strict criteria, with most restrictions centered on absolute contraindications and specific population limitations documented by government health authorities.

Absolute Contraindications

The medicine must not be administered to patients with a history of or active thromboembolic disease or individuals with porphyria. It is also contraindicated in patients with androgen-dependent tumors and those with undiagnosed abnormal genital bleeding. Furthermore, Danatrol is prohibited in cases of markedly impaired hepatic, renal, or cardiac function.

Age and Reproductive Status

Use is contraindicated in women who are pregnant or breastfeeding. Women of childbearing potential must use non-hormonal contraception throughout therapy.

For age groups, the safety and effectiveness have not been established in pediatric patients (children and adolescents). Data is also insufficient for use in the geriatric population (older adults).

Conditional Use

Patients with certain conditions, such as epilepsy, migraine, hypertension, or diabetes mellitus, require careful observation and the medicine should be used with caution, as stated in official labeling.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Danatrol (Danazol) is officially documented by regulatory authorities, focusing on specific pharmacokinetic and pharmacodynamic effects with co-administered medicines.

Documented Pharmacokinetic Interference

Danatrol use may cause an increase in the plasma concentration of several co-administered drugs. This effect is relevant for immunosuppressants, such as Cyclosporine and Tacrolimus, which may lead to increased renal toxicity. Similarly, the levels of certain anticonvulsants, including Carbamazepine, may be raised.

Interactions Involving Toxicity and Potentiation

Co-administration with specific HMG-CoA Reductase Inhibitors (statins), such as Simvastatin, Atorvastatin, and Lovastatin, is officially associated with an increased risk of severe musculoskeletal toxicity, specifically myopathy and rhabdomyolysis.

Danatrol also exhibits a pharmacodynamic interaction with Oral Anticoagulants, causing a prolongation of prothrombin time in patients stabilized on agents like Warfarin.

Other Endocrine-Related Interactions

The medication may also diminish the therapeutic effectiveness of Antidiabetic Drugs due to its potential to cause insulin resistance. Conversely, it can increase the calcemic response when co-administered with synthetic Vitamin D analogs.

Population-Based Interaction Constraints

Danazol is contraindicated in patients with Porphyria because it interacts with the internal metabolic pathway by inducing ALA synthetase activity. No mandatory timing-based separation rules for co-administration are explicitly documented in the regulatory information.

Mechanism of Action

Direct Receptor and Enzyme Modulation

Danatrol is a synthetic steroid derivative that binds to high-affinity progesterone and androgen receptors, and with lower affinity to glucocorticoid receptors, thereby modulating gene transcription. It competitively inhibits several key enzymes in the steroidogenesis pathway, including 3-beta-hydroxysteroid dehydrogenase and P450 side-chain cleavage. This inhibition results in the reduced endogenous production of both estrogen and progesterone. Its anti-estrogenic effects lead to reduced systemic estrogen levels and a subsequent decrease in osteoclast activity.


Endocrine Axis Suppression and Hormonal Effects

Additionally, Danatrol exerts an inhibitory effect on pituitary gonadotropin secretion by reducing the hypothalamic-pituitary-gonadal (HPG) axis activity, which decreases the pulsatility and amplitude of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) release. This cascade modifies the circulating concentrations of sex hormones. Due to its partial agonist activity at androgen receptors, Danatrol also decreases hepatic synthesis of Sex Hormone-Binding Globulin (SHBG), thereby increasing the fraction of free testosterone.

Dosage and Administration Information

The administration of Danatrol (danazol) capsules must strictly adhere to established dosing guidelines, ensuring a proper therapeutic course.

Official Administration Guidelines

Guideline Instruction
Route of Administration The medication is taken orally (by mouth) as a capsule.
Dosing Frequency The total daily dose is typically administered in two divided doses (twice a day) or, for certain conditions, two or three times a day.
Timing with Meals The capsules must be taken with food (a meal). Taking the drug with a meal, particularly one with a high fat content, increases the amount of drug the body absorbs by three-to-four fold.

Procedural and Dosing Protocol

For women of childbearing potential, the initiation of Danatrol treatment is subject to specific constraints. Treatment must begin during menstruation, or only after appropriate tests have been performed to ensure the patient is definitively not pregnant prior to starting therapy.

If a dose is missed, standard protocols indicate the patient should take the missed dose as soon as it is remembered. However, if it is almost time for the next scheduled dose, the patient should skip the missed dose and return to the regular schedule, and must not take a double or extra dose to compensate.

Therapy is not intended for short-term use; the dosage should be taken regularly and uninterrupted for the entire prescribed duration, which may range from three to nine months, depending on the medical condition and individual response. Safety and effectiveness in children have not been established.

Recent Clinical Evidence

Research evidence / Overview of Studies for Danatrol

Danatrol (Danazol) was studied for specific chronic conditions. The available evidence is derived from clinical trials, including those comparing it against an inactive substance (placebo) or other compounds, as well as observational studies that track long-term patterns. Research has explored the structure of these studies and the patterns observed in the studied populations.


Evidence for Use in Endometriosis and Severe Fibrocystic Breast Disease

Research examined Danazol was studied for conditions characterized by outcomes related to physical discomfort, such as endometriosis and severe, symptomatic fibrocystic breast disease. Studies were conducted using Randomized Controlled Trials (RCTs), where researchers examined outcomes against an inactive substance (placebo) or other compounds used in research exploring how symptoms change over time.

Long-term outcomes are not fully established regarding symptom recurrence after the medicine is stopped. Furthermore, data for certain groups, such as those with endometriosis-associated infertility, remain insufficient, and research has explored this area with limited and mixed findings.


Evidence for Use in Hereditary Angioedema (HAE) Prophylaxis

Danazol was evaluated in studies for its role as a preventive measure for acute swelling attacks in Hereditary Angioedema (HAE), a condition characterized by fluctuating or episodic manifestations. These studies included Randomized Controlled Trials (RCTs), sometimes using a crossover design, and extensive long-term observational reports.

Controlled trials described patterns observed during the study periods, noting differences in attack frequency compared to placebo or pre-treatment periods in the observed populations. These findings contribute to the broader evidence landscape for long-term observation of this rare disease.

What remains uncertain includes the fact that sample sizes were modest due to the rarity of the condition. Long-term effects are not fully established by prospective controlled trials, with evidence primarily derived from retrospective data and observational cohort reports.


Research Gaps and Unanswered Questions

Scientific and regulatory documents confirm that the evidence quality varies across studies, leading to recognized research gaps. Limited information for long-term outcomes remains a primary research limitation across most indications, particularly regarding symptom recurrence after the medicine is discontinued.

Additionally, comparative evidence is lacking in certain areas, such as the direct comparison of Danazol against newer targeted therapies. Findings describe group patterns, not personal outcomes. Research provides context but not individual predictions.

Frequently Asked Questions (FAQ)

Common questions about Danatrol (FAQ)

Q: Is Danatrol a hormone replacement therapy?

A: According to official product information, Danatrol is classified as an attenuated androgen and a gonadotropin inhibitor. It works by decreasing the body's natural output of estrogen and other hormones. This action is distinct from the general goal of traditional hormone replacement therapy, which involves adding hormones back into the body.

Q: Is there a generic version of Danatrol available?

A: Yes, the active ingredient in Danatrol is Danazol, and this compound is available as an FDA-approved generic capsule.

Q: How quickly should I expect to see an effect after starting Danatrol?

A: Official information indicates that the time frame for a noticeable effect varies by condition. For individuals using Danatrol for fibrocystic breast disease, relief of pain and tenderness is often observed within the first month of treatment. For endometriosis, patients typically cease menstruation (amenorrhea) after the first menstrual period following treatment initiation.

Q: Can men take Danatrol for any reason?

A: Yes, regulatory documents state that the active ingredient, Danazol, is officially indicated for use in both men and women. This is specifically for the prevention of attacks associated with hereditary angioedema (HAE), a rare condition characterized by episodic swelling.

Q: Does Danatrol interact with common over-the-counter pain relievers?

A: Official product labeling does not specifically name common over-the-counter pain relievers, such as ibuprofen or acetaminophen, as definite interactions. However, general safety guidelines encourage patients to inform their healthcare provider of all concomitant therapies, including prescription and non-prescription drugs, to assess any potential risks.

Q: Can Danatrol affect cholesterol levels?

A: Studies and official information indicate that Danazol therapy may cause changes to plasma lipid abnormalities (levels of fats in the blood). Because of this potential effect, official information indicates that lipid profiles may be monitored periodically during treatment.

Q: Is Danatrol used to treat symptoms of menopause?

A: Official regulatory documents state that Danazol is not indicated for the treatment of general symptoms associated with menopause. Its officially approved uses are limited to specific conditions, including endometriosis, fibrocystic breast disease, and hereditary angioedema.

Q: Does Danatrol have any major food restrictions, like grapefruit?

A: The primary official instruction is that the capsule must be taken with food to enhance the drug's absorption into the body. While specific foods like grapefruit are not named as definite restrictions, it is an established safety practice to discuss diet with a healthcare professional due to the medication’s known effects on liver enzymes.

Q: Does Danatrol make you tired or dizzy?

A: Official documentation lists side effects such as headache and the potential for a serious, rare condition called benign intracranial hypertension. This condition can cause severe headache, nausea, and visual disturbances. While not always listed, dizziness is mentioned in some patient information sources as a potential effect.

Q: What should I do if I experience unexpected side effects from Danatrol?

A: Official patient counseling materials describe that contacting a clinician immediately or seeking emergency medical help is appropriate when serious or unexpected side effects occur. This is particularly important for signs of serious conditions like blood clots, vision changes, or liver injury.

Q: Can Danatrol be taken with other hormonal medications?

A: According to official prescribing information, Danatrol can interfere with the effectiveness of hormonal contraceptives (birth control pills). The regulatory requirement is that women use a non-hormonal method of contraception throughout the entire course of therapy.

Q: Do official documents mention any known interactions with herbal supplements?

A: Yes, patient counseling materials from regulatory authorities describe the practice of informing clinicians of all existing therapy. This includes prescription and non-prescription drugs, as well as any concomitant illnesses, herbal products, or dietary supplements being taken.

Q: Is it possible to have an allergic reaction to Danatrol?

A: Although reported as rare, severe allergic reactions to Danazol have been documented in official adverse reaction reports. Signs of a potential severe reaction include rash, hives, itching, and swelling of the face, lips, tongue, or throat.

Q: Why is monitoring necessary while taking Danatrol?

A: Official warnings and precautions indicate that monitoring is necessary to evaluate for the development of potentially serious side effects. This includes monitoring for hepatic (liver) toxicity, for which periodic liver function evaluation is recommended, and for signs of virilization (masculinizing effects) in female patients.

Q: What is the original approval year for Danatrol?

A: The active ingredient, Danazol, was approved by the U.S. Food and Drug Administration (FDA) as a targeted treatment for endometriosis, marking its initial regulatory recognition.

Q: Does Danatrol have a boxed warning in official labeling?

A: Yes, the official labeling for Danatrol contains a Boxed Warning, which is the most serious level of warning required by the FDA. This warning alerts prescribers and patients to the risks of thromboembolic events, the drug’s contraindication during pregnancy, potential hepatic effects, and intracranial hypertension.

How should Danatrol be stored and disposed of?

How to Store and Dispose of Danatrol?

Danatrol capsules must be stored in compliance with official regulatory requirements to maintain product integrity.

Storage Conditions

Requirement Official Instruction
Temperature Store at room temperature, typically between 15°C and 30°C (59°F and 86°F).
Protection Keep away from freezing, excess heat, moisture, and light.
Container Keep in the container it was dispensed in, and ensure it is tightly closed.

Child Safety and Disposal

The medication must be kept out of the sight and reach of children; locked safety caps should be used, and the container stored in an elevated location. For disposal, do not throw unused or expired Danatrol in the toilet or down the drain. Patients must ask a pharmacist or healthcare professional for guidance on how to properly dispose of any medicine that is no longer needed.

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

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