Аназалес

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Аназалес

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

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

Overview of Аназалес

Quick Facts: What is Anazales?

Property Description
Active ingredient Anastrozole (INN)
Form Tablets (for oral use)
Pharmacological class Aromatase Inhibitor (Non-steroidal, Third-generation)
Common purpose Hormonal management in postmenopausal women
Origin Synthetic (Triazole derivative)

What Type of Medicine is Anazales?

Anazales is a potent, prescription-only medication whose active ingredient is Anastrozole, a synthetic non-steroidal compound. It is an anti-estrogen agent and is classified as a third-generation Aromatase Inhibitor. This drug belongs to a specialized class of endocrine therapy and is clinically recognized for its method of managing hormone-sensitive conditions.

As a brand containing Anastrozole, Anazales provides a standardized dose of this highly selective inhibitor in an oral tablet format. The medication's non-steroidal structure is a key feature, which supports its mechanism of competitive and targeted enzyme inhibition.

Composition, Form, and General Purpose

The medication is manufactured as tablets for oral administration and is a single-ingredient product, containing only Anastrozole alongside pharmaceutical excipients. Its general purpose is to control and manage medical conditions that rely on estrogen for growth, primarily in postmenopausal women.

The core mechanism involves the selective inhibition of the aromatase enzyme, which is the main biological pathway for the peripheral biosynthesis of estrogen (such as estradiol) in this patient group. By causing a significant suppression of plasma estrogen levels, the drug reduces the primary growth-promoting hormonal signal. This targeted hormonal action is an essential approach in the long-term management of specific hormone-dependent conditions.

What side effects are possible with Аназалес?

Adverse Effects and Safety Information

The safety profile of Anaзалес (Anastrozole) is officially documented by government regulatory bodies (such as the FDA and EMA) and is primarily shaped by the effects of significant estrogen suppression.

Frequency-Classified Adverse Reactions

The adverse reactions are categorized based on their observed frequency in clinical studies:

Frequency Category Examples of Officially Listed Side Effects
Very Common (ge 1/10) Hot flushes, arthralgia (joint stiffness/pain), asthenia (weakness), headache, nausea.
Common (ge 1/100 to < 1/10) Hypercholesterolaemia (high cholesterol), depression, somnolence, vomiting, hair thinning (alopecia), bone pain, osteoporosis, vaginal dryness, vaginal bleeding.
Uncommon to Very Rare Hypercalcaemia, hepatitis, urticaria, Carpal Tunnel Syndrome, Stevens-Johnson syndrome (SJS), and angioedema.

Serious Adverse Reactions and Safety Risks

Regulatory documents highlight several serious and clinically significant safety concerns:

  • Bone Health: Long-term use is associated with a decrease in Bone Mineral Density (BMD) and a consequently increased risk of fractures.
  • Cardiovascular Events: An increased incidence of ischemic cardiovascular events has been noted in certain patient groups compared to Tamoxifen use.
  • Hypersensitivity: Rare, but severe allergic reactions are documented, including anaphylaxis and angioedema.

Regulatory Safety Constraints

Specific limitations on use are defined in the official labeling:

  • Contraindications: Anaзалес is formally contraindicated for use in premenopausal women and in pregnant or breastfeeding women.
  • Monitoring Requirements: Official labels advise monitoring Bone Mineral Density (BMD) and cholesterol levels due to potential adverse effects.
  • Avoidance: Co-administration with Tamoxifen or any oestrogen-containing therapies should be avoided.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documentation for Anastrozole (Аназалес) indicates that clinical experience regarding accidental overdosage is limited. Consequently, a specific single dose resulting in life-threatening symptoms has not been established in labeling, and specific clinical signs of acute overdose are not formally defined.

Immediate actions are mandated for any suspected overdose: authorities require patients to seek emergency medical attention or contact a poison control center at once. Urgent medical help must be sought immediately if the individual has collapsed, experienced a seizure, has trouble breathing, or cannot be awakened.

Management protocol is officially directed to be symptomatic and supportive. There is no specific known antidote for Anastrozole overdosage. Supportive care includes frequent monitoring of vital signs and close observation of the patient's condition. Due to the drug's protein binding characteristics, the official guidance notes that dialysis may be helpful in management.

Therapeutic Uses of Аназалес

Anazales is considered relevant within endocrine therapy, applied in addressing conditions marked by systemic imbalance in postmenopausal women. Primary uses include long-term management of early-stage hormone receptor-positive breast cancer, treatment for advanced or metastatic disease, and primary prevention in high-risk individuals. The medication is relevant across therapeutic domains where additional symptomatic support is needed.

This treatment is commonly used to help with managing the risk of pathological progression. Anazales helps address symptom clusters that may become intense or disruptive and contributes to easing the overall symptom load. This provides support that helps ease the overall symptom burden in situations where functional stability becomes affected.

Quick Fact: Primary Therapeutic Benefits
Recurrence Risk May assist with lowering the risk of disease recurrence after initial therapy.
Tumor Control Applied in addressing the progression of existing tumor growth.
Prophylactic Use May assist with managing the risk of developing a new primary malignancy in high-risk women.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Official Regulatory Eligibility for Anazales

The eligibility profile for Аназалес (Anastrozole) is strictly defined by regulatory bodies (such as the FDA and EMA) and is based primarily on the patient's hormonal status and physiological health. The medicine is officially indicated for use in postmenopausal women, including older adults, and no dosage adjustment is typically required based on age alone.

Populations Who Must Not Use (Contraindicated)

Category Regulatory Status
Hormonal Status Contraindicated in premenopausal women, pregnant women, and lactating women.
Allergies Contraindicated in patients with a known hypersensitivity to the active substance or excipients.
Organ Function Contraindicated by some regulators in patients with severe hepatic impairment or severe renal impairment ( CrCl lt 20 mL/ min).

Conditions and Restrictions

Use is not recommended in children and adolescents, as safety and efficacy have not been established. Use requires caution in patients with moderate hepatic impairment or severe renal impairment ( CrCl lt 30 mL/ min) and in those with pre-existing ischemic heart disease. Patients with specific rare hereditary sugar problems should also not take the medicine.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Anazales (Anastrozole) establishes interaction patterns that fall into two main categories: pharmacodynamic conflict and pharmacokinetic modification.

Documented Interaction Restrictions

Interacting Substance Official Restriction and Mechanism
Estrogen-Containing Therapies Co-administration is restricted due to pharmacodynamic antagonism, which may diminish or negate the pharmacological action of Anazales.
Tamoxifen Combination use is prohibited, as co-administration reduces Anastrozole plasma concentration by 27%, a pharmacokinetic effect that results in no additional benefit over monotherapy.

Metabolic and Systemic Clearance

Anazales is a weak in vitro inhibitor of certain cytochrome P450 enzymes (e.g., CYP3A4); however, it is officially considered unlikely to cause clinically significant drug interactions with other medicines metabolized by these pathways. Co-administration with Warfarin has been documented to result in no clinically significant alteration of its pharmacokinetics or anticoagulant activity.

Population and Food Constraints

The medication may be taken with or without food; while food reduces the rate of absorption, the overall extent of exposure remains unchanged, and this difference is not considered clinically significant. Clearance is officially reduced by approximately 30% in patients with stable hepatic cirrhosis, resulting in increased systemic exposure, though regulatory texts affirm that no dosage adjustment is necessary in this population.

Mechanism of Action

Targeted Inhibition of the Aromatase Enzyme

Anazales (Anastrozole) acts as a selective, non-steroidal competitive inhibitor of the Aromatase enzyme (CYP19A1) . The drug binds reversibly to the enzyme's active site, thereby blocking the final molecular step in the conversion of androgens into active estrogen hormones, such as Estradiol.

Interruption of Peripheral Estrogen Synthesis

The primary physiological consequence of this inhibition is the rapid and substantial interruption of extraglandular (peripheral) estrogen biosynthesis. This mechanism causes a substantial reduction in the metabolic activity of circulating estrogen sources, leading to a sustained suppression of plasma estrogen levels by over 90%.

Mechanistic Selectivity and Constraints

The mechanism demonstrates high selectivity, focusing only on the aromatase pathway without significantly affecting the production of adrenal corticosteroids (e.g., cortisol). This action is functionally constrained in situations where estrogen is produced by active ovarian function, as the mechanism relies on inhibiting only peripheral synthesis.

Dosage and Administration Information

How Аназалес is Used: Administration Guidelines

Аназалес (Anastrozole) is used as an oral tablet, adhering to a standardized, once-daily regimen. The medicine is provided in a single strength of 1 mg, which serves as both the starting and maintenance dose for its applications, eliminating the need for dose titration in adults.

Dosing Schedule and Frequency

Administration follows a simple pattern: a 1 mg tablet is taken once daily. The medicine may be consumed with or without food, providing flexibility in the daily schedule. If a dose is missed, it should be taken as soon as it is remembered; however, two doses should not be taken together to compensate for a skipped one.

Treatment Duration and Adjustments

The total duration of use is scenario-dependent. For adjuvant therapy (use following initial treatment), a typical fixed duration is 5 years. For advanced disease, the therapy continues long-term until objective evidence of disease progression is observed.

No dosage adjustment is required for older adults. Similarly, no modification to the 1 mg dose is generally necessary for individuals with mild to moderate kidney or liver impairment, though caution is noted for severe impairment. Additionally, the medicine should not be co-administered with Tamoxifen or any estrogen-containing therapies.

Recent Clinical Evidence

Evidence for use in Early-Stage Hormone Receptor-Positive Disease

Research is primarily based on large-scale Randomized Controlled Trials (RCTs) conducted over five years in postmenopausal women with hormone receptor-positive early breast cancer. These studies explored outcomes like Time to Recurrence (TTR) and Disease-Free Survival (DFS) against the hormonal comparator, tamoxifen. Findings described patterns showing a longer median time for TTR and DFS in the Anastrozole group compared to tamoxifen. This difference in recurrence rates was still observed after the active treatment ended. Long-term follow-up analyses reported no material difference in Overall Survival (OS) between the two treatments.


Evidence for use in Advanced or Metastatic Disease

The medicine was evaluated as both a first-line therapy and for disease that had progressed following prior treatment.

First-Line Treatment for Advanced Disease: RCTs monitored Time to Progression (TTP) and Objective Response rates, reporting patterns sometimes similar to, or longer than, tamoxifen.

Treatment Following Prior Endocrine Therapy: A combined analysis of trials reported measurements showing a longer median survival time compared to an older hormonal agent (megestrol acetate). Research remains limited regarding direct comparison with modern second-line therapies.


Long-term Studies, Special Populations, and Uncertainty

Key studies included extensive long-term follow-up periods, with observation extending beyond eight years, allowing for the collection of data related to the durability of recurrence patterns. Its use and observed patterns in the elderly patient population are described within the main body of research. Evidence for the main indication has not been established in non-adult populations. Overall, research is ongoing, with optimal sequencing of treatments and the long-term impact on specific physical markers remaining areas of continued investigation.

Frequently Asked Questions (FAQ)

Common questions about Аназалес (FAQ)

Q: Is Аназалес a common treatment for [Disease State]?

A: According to official regulatory documents, this medicine is officially indicated as an endocrine therapy. It is used for the management of specific hormone receptor-positive conditions that rely on estrogen for growth, primarily in women who have gone through menopause.

Q: How is Аназалес different from similar medicines in its class?

A: Official documents classify Аназалес as a non-steroidal third-generation aromatase inhibitor. This means it targets the aromatase enzyme in a selective and reversible way to block estrogen production. Its specific non-steroidal structure is a key feature in its pharmacological classification.

Q: Is there a generic version of Аназалес available?

A: Yes, the active ingredient in Аназалес is anastrozole. Regulatory authorities like the U.S. FDA have approved generic versions of anastrozole for use.

Q: How long does it usually take for a person to notice the effects of Аназалес?

A: The medicine is designed for long-term use, and the onset of observable clinical effects is gradual. However, official information indicates that the active ingredient rapidly suppresses the body’s estrogen levels, with stable concentrations typically reached after about one week of consistent daily use.

Q: What should I do if I forget to take Аназалес?

A: If a person forgets to take a dose, official instructions state to take it as soon as it is remembered. However, official instructions advise against taking two doses at once to make up for a forgotten dose.

Q: Is it normal to feel [vague common side effect] after starting Аназалес?

A: Official documents list side effects based on how frequently they were observed in clinical studies (Very Common, Common, etc.). If a symptom is one that is categorized as 'Very Common' or 'Common,' it is a frequently observed event documented in the safety profile. It is important to discuss any concerns about observed effects with a healthcare professional.

Q: What is the risk of dependence or addiction with Аназалес?

A: The active ingredient in this medicine, anastrozole, is generally not classified as a controlled substance by major regulatory authorities. This classification indicates that the medicine is not associated with risk of physical dependence or addiction.

Q: Can I take pain relievers while using Аназалес?

A: According to official product information, this medicine is considered unlikely to cause clinically significant drug interactions with many other medicines. This is because it is only a weak inhibitor of the common metabolic pathways (CYP enzymes) that break down other medicines.

Q: How long can a person safely stay on Аназалес treatment?

A: The total duration of use is scenario-dependent and is determined by a physician. For adjuvant use (following initial treatment), official protocols typically define treatment for a fixed duration of five years. For advanced disease, therapy often continues long-term until evidence of disease progression is observed.

Q: Is it safe to drink alcohol while on Аназалес?

A: Based on official patient information and safety data, consuming alcohol does not appear to affect the medicine's safety or its effectiveness. It is generally advised to discuss all forms of consumption, including alcohol, with a healthcare professional.

Q: What happens if I suddenly stop taking Аназалес?

A: Clinical trial data reviewed by regulatory bodies indicate that stopping the medicine before the prescribed course is complete may increase the risk of disease recurrence. Regulatory trial data indicates that the medicine must be taken for the full prescribed duration to achieve the studied outcomes.

Q: Does Аназалес show up on a standard drug test?

A: The active ingredient, anastrozole, is generally not included in routine, non-athletic drug screenings. However, due to its class as an aromatase inhibitor, it is a substance that is prohibited for use by major anti-doping and athletic organizations worldwide.

Q: Is it okay to drive or operate machinery while taking Аназалес?

A: The medicine is documented to cause somnolence (drowsiness) and asthenia (weakness) in some people. Official regulatory warnings advise against operating machinery or driving if symptoms such as somnolence or asthenia occur.

Q: Can I take Аназалес if I am trying to get pregnant?

A: Regulatory guidance states that this medicine is contraindicated for use by women who are trying to conceive or who are pregnant. For women of childbearing potential, effective non-hormonal contraception is required during the full course of treatment and for a defined period following the last dose.

Q: Does Аназалес cause weight changes?

A: Weight change has been documented as an adverse event in clinical studies that support the medicine's regulatory approval. This effect was reported in less than 10% of patients.

Q: Does taking Аназалес at a certain time of day matter?

A: The official administration is once daily, and the medicine can be taken with or without food. To help ensure compliance and maintain consistent levels of the active ingredient, patient information often advises establishing a routine to take the tablet at the same time each day.

Q: What should I do if my symptoms do not improve after starting Аназалес?

A: This medicine is part of a long-term treatment plan that requires scheduled professional monitoring. A healthcare provider typically evaluates the response to treatment using clinical and laboratory measures, as opposed to relying solely on a patient's changes in symptoms.

Q: How does the medicine know where to work in the body?

A: The medicine is designed with high selectivity to target and attach only to the aromatase enzyme. This enzyme is the primary source for producing estrogen in the body after menopause. By selectively inhibiting this specific biological pathway, the medicine achieves its intended effect.

Q: Will Аназалес change how my other long-term medicines work?

A: Regulatory warnings note specific conflicts with other medications, particularly estrogen-containing therapies and Tamoxifen, where co-administration is restricted due to reduced effectiveness. Due to documented restrictions, it is standard practice to review all long-term medicines and supplements with a physician before starting treatment.

Q: Is Аназалес meant to be taken short-term or long-term?

A: This medicine is classified as a long-term treatment. Official protocols recommend a duration of 5 years for adjuvant use, or for advanced disease, treatment is typically continued until evidence of disease progression is observed.

Q: Do I need to change my diet while taking Аназалес?

A: The official guidance states that the medicine can be taken with or without food, as this does not change the overall absorption of the active ingredient. No specific, mandatory dietary changes are mandated by regulatory agencies solely based on the drug's use.

Q: Is Аназалес a type of steroid or immunosuppressant?

A: Official documents classify this medicine as a non-steroidal aromatase inhibitor, meaning its chemical structure is not steroid-based. Its action is highly selective and does not interfere with the body's natural production of adrenal corticosteroids (natural steroids), nor is it classified as an immunosuppressant.

Q: Can people with high cholesterol use Аназалес?

A: Official guidance notes that high cholesterol is a potential side effect of this medicine. Regulatory documents advise monitoring cholesterol levels in all patients. This monitoring is specified as particularly important for individuals who have pre-existing high cholesterol.

Q: Can Аназалес affect fertility?

A: This medicine is indicated for use in postmenopausal women, and its use is contraindicated in premenopausal women due to its mechanism of action. Official documents indicate that the active ingredient has been documented in animal studies to show potential effects on fertility.

How should Аназалес be stored and disposed of?

How to Store and Dispose of Anazales (Anastrozole)

Anastrozole tablets must be stored at controlled room temperature, specifically maintained between 20 C and 25 C (68 F and 77 F). The medication must be kept in the original container to maintain its stability and should always be stored out of the sight and reach of children.

Storage Requirement Condition
Temperature Range 20 C to 25 C (68 F to 77 F)
Packaging Rule Store in original container
Safety Rule Keep out of the sight and reach of children

For disposal, regulatory instructions state that unused or expired Anazales must not be disposed of via wastewater or regular household waste. Instead, the product should be returned to a pharmacist or a local waste disposal program for proper handling as pharmaceutical waste.

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

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