Background pattern

Tamoxifeno vir 20 mg comprimidos efg

About the medicine

How to use Tamoxifeno vir 20 mg comprimidos efg

Introduction

Package Leaflet: Information for the User

Tamoxifeno Vir 20 mg Tablets EFG

Read this leaflet carefully before you start taking this medicine because it contains important information for you.

  • Keep this leaflet as you may need to read it again.
  • If you have any questions, ask your doctor or pharmacist.
  • This medicine has been prescribed for you and should not be given to others, even if they have the same symptoms as you, as it may harm them.
  • If you experience any side effects, consult your doctor or pharmacist, even if they are not listed in this leaflet. See section 4.

Table of Contents:

  1. What Tamoxifeno Vir is and what it is used for.
  2. What you need to know before taking Tamoxifeno Vir.
  3. How to take Tamoxifeno Vir.
  4. Possible side effects.
  5. Storage of Tamoxifeno Vir.
  6. Contents of the pack and additional information

1. What is Tamoxifeno Vir and what is it used for

Tamoxifeno Vir belongs to a group of medications known as anti-estrogens.

Estrogen is present in your body and is a natural substance known as a “sex hormone”. Tamoxifeno acts by blocking the effects of estrogen.

Tamoxifeno Vir is indicated for certain breast pathologies.

2. What you need to know before taking Tamoxifen Vir

Do not take Tamoxifeno Vir

?If you are allergic to tamoxifen or any of the other components of this medication (listed in section 6).

  • If you are pregnant (see “Pregnancy, breastfeeding and fertility”).

Warnings and precautions

Consult your doctor or pharmacist before taking tamoxifen.

  • The concomitant administration with the following medications should be avoided, as the effects of tamoxifen cannot be ruled out: paroxetine, fluoxetine (e.g. antidepressants), bupropion (antidepressant or used to quit smoking), quinidine (used in the treatment of cardiac arrhythmia) and cinacalcet/cinaclet (for the treatment of parathyroid gland disorders).
  • If you are using a contraceptive method. Consult your doctor about the contraceptive methods you should use, as some may be affected by this medication.
  • It is essential to inform your doctor immediately if you experience any unusual vaginal bleeding or other gynecological symptoms (such as pelvic pain or pressure) during treatment with tamoxifen or at any time thereafter. This is because certain changes may occur in the uterus (endometrium), some of which may be severe.
  • Before starting treatment with this medication, it is essential to inform your doctor if you or any family member has a history of blood clots or any known hereditary condition that increases the risk of blood clot formation.
  • Inform hospital staff that you are taking tamoxifen if you are admitted to a hospital.
  • In a delayed breast reconstruction surgery (weeks or years after the primary breast surgery, when your own tissue is moved to shape a new breast), tamoxifen may increase the risk of blood clot formation in small blood vessels of the tissue graft, which may lead to complications.
  • This medication contains tamoxifen, which may produce a positive result in doping control tests.
  • Severe skin reactions, including Stevens-Johnson syndrome and toxic epidermal necrolysis, have been reported in association with tamoxifen treatment. If you experience any symptoms related to these severe skin reactions described in section 4, stop using Tamoxifeno Vir and seek medical attention immediately.
  • If you have a history of hereditary angioedema, as Tamoxifeno Vir may provoke or worsen angioedema symptoms. If you experience symptoms such as facial swelling, lips, tongue, and/or throat with difficulty swallowing or breathing, contact a doctor immediately.

Children and adolescents

Tamoxifen should not be administered to children/adolescents, as its safety and efficacy have not been established in this age group.

Use of Tamoxifeno Vir with other medications

Inform your doctor or pharmacist if you are using, have used recently, or may need to use any other medication.

Never take another medication on your own initiative without your doctor's recommendation, as some combinations should be avoided.

In particular, you should inform your doctor if you are taking any of the following medications:

  • Warfarin (an oral anticoagulant to prevent blood clots)
  • Rifampicin (for tuberculosis).
  • Aromatase inhibitors such as anastrozole, letrozole, or exemestane (used to treat breast cancer).
  • Paroxetine, fluoxetine (antidepressants).
  • Bupropion (antidepressant or used to quit smoking).
  • Quinidine (used in the treatment of cardiac arrhythmia).
  • Cinacalcet (for the treatment of parathyroid gland disorders)

Pregnancy, breastfeeding and fertility

If you are pregnant or breastfeeding, or think you may be pregnant, consult your doctor or pharmacist before using this medication.

You should not be pregnant during treatment with tamoxifen or for two months after stopping treatment.

Do not take tamoxifen if you are breastfeeding, unless your doctor has evaluated the risks and benefits involved. It is not known if tamoxifen passes into breast milk.

Driving and operating machinery

The influence of tamoxifen on the ability to drive and operate machinery is small.

However, fatigue has been reported with tamoxifen use, so you should exercise caution when driving or operating machinery while these symptoms persist.

3. How to Take Tamoxifeno Vir

Follow exactly the administration instructions for this medication as indicated by your doctor. In case of doubt, consult your doctor or pharmacist again.

Tamoxifeno Dosage

?The recommended dose is one tablet (20 mg) to two tablets (40 mg) per day.

?Tamoxifeno Vir is usually taken one or two times a day.

?Swallow the tablets whole with water.

?Try to take the tablet at the same time every day.

Do not stop taking your tablets even if you feel well, unless your doctor tells you to.

Use in Children and Adolescents

Tamoxifeno should not be administered to children/adolescents, as its safety and efficacy have not been established in this age group.

If You Take More Tamoxifeno Vir Than You Should:

If you have taken more tamoxifeno than you should, contact your doctor or the nearest hospital immediately. In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately or call the Toxicological Information Service. Phone 91 562 04 20.

If You Forget to Take Tamoxifeno Vir:

If you forget a dose, take it as soon as you remember. Do not take a double dose to make up for the missed dose.

If You Interrupt Treatment with Tamoxifeno Vir

Your doctor will indicate the duration of your treatment with tamoxifeno. Do not stop treatment before your doctor tells you to.

If you have any doubts about the use of this medication, ask your doctor or pharmacist.

4. Possible Adverse Effects

Like all medicines, this medicine may cause side effects, although not everyone will experience them.

Frequency

Side Effects

Very common

(affects more than 1 in 10 patients)

Metabolism and nutrition disorders: Fluid retention.

Vascular disorders: Hot flashes.

Gastrointestinal disorders: Nausea.

Skin and subcutaneous tissue disorders: Rash.

Reproductive and breast disorders: Vaginal bleeding, vaginal discharge.

General and local reactions: Fatigue.

Common

(affects between 1 and 10 in 100 patients)

Benign, malignant, and unspecified neoplasms (including cysts and polyps): Uterine fibroids.

Blood and lymphatic system disorders: Decreased red blood cell count (anemia).

Immune system disorders: Hypersensitivity reactions (allergic reactions).

Nervous system disorders: Sudden onset of weakness or paralysis of the arms or legs, sudden difficulty speaking, walking, holding things, or thinking (any of these may occur due to decreased blood flow to the brain and these symptoms may be a sign of a stroke), headache, dizziness, sensory disturbances (including taste disturbances and numbness or tingling of the skin).

Eye disorders: Cataracts, changes in the retina.

Gastrointestinal disorders: Vomiting, diarrhea, constipation.

Hepatobiliary disorders: Changes in liver enzymes, fatty liver.

Skin and subcutaneous tissue disorders: Hair loss.

Musculoskeletal and connective tissue disorders: Leg cramps, muscle pain.

Reproductive and breast disorders: Vaginal itching, endometrial changes (interior of the uterus).

Investigations: Increased levels of cholesterol in the blood.

Disorders affecting multiple organs or systems: Increased risk of blood clots (including small vessel thrombosis).

Uncommon

(affects between 1 and 10 in 1,000 patients)

Benign, malignant, and unspecified neoplasms (including cysts and polyps): Endometrial tumor (interior of the uterus).

Blood and lymphatic system disorders: Decreased platelet count (thrombocytopenia), decreased white blood cell count (leucopenia).

Metabolism and nutrition disorders: Elevated calcium levels in the blood (in patients with bone metastases).

Eye disorders: Vision changes.

Respiratory, thoracic, and mediastinal disorders: Inflammation of the lung area, which may present with symptoms similar to pneumonia, such as difficulty breathing and cough.

Gastrointestinal disorders: Pancreatitis (pain or tenderness in the upper abdomen).

Hepatobiliary disorders: Cirrhosis of the liver (symptoms may include general malaise, with or without yellowing of the skin and eyes), which in some cases has resulted in death.

Rare

(affects between 1 and 10 in 10,000 patients)

Benign, malignant, and unspecified neoplasms (including cysts and polyps): Uterine tumor (matrix), symptoms related to its disease.

Blood and lymphatic system disorders: Decreased neutrophil count (neutropenia), isolated decrease in levels of a specific type of white blood cell (agranulocytosis).

Nervous system disorders: Optic nerve inflammation and in a small number of cases, loss of vision (caused by optic nerve inflammation).

Eye disorders: Changes in the cornea, optic nerve disorders, and in a small number of cases, loss of vision (caused by optic nerve disorders).

Hepatobiliary disorders: Hepatitis, bile duct obstruction, liver failure, liver cell damage (symptoms may include general malaise, with or without yellowing of the skin and eyes), which in some cases has resulted in death.

Skin and subcutaneous tissue disorders: Angioedema (swelling of the face, lips, tongue, or throat), inflammation of small blood vessels in the skin causing a skin rash, severe skin reactions, including lesions, ulcers, or vesicles.

Reproductive and breast disorders: Endometrial tissue disorders, ovarian cysts, vaginal polyps (non-tumorous mass in the vagina).

Very rare

(affects less than 1 in 10,000 patients)

Skin and subcutaneous tissue disorders: Cutaneous lupus erythematosus (inflammation of the skin characterized by a rash or redness, especially in exposed areas).

Congenital, familial, and genetic disorders: Skin disorder characterized by the presence of blisters due to elevated production of a special group of pigments (called porphyrins) by the liver.

Stop using Tamoxifeno Vir and seek medical attention immediately if you notice any of the following symptoms:

Flat, red, circular, or target-like patches on the trunk, often with central blisters, skin peeling, ulcers in the mouth, throat, nose, genitals, and eyes. These severe skin rashes may be preceded by fever and symptoms similar to Stevens-Johnson syndrome or toxic epidermal necrolysis – these side effects occur rarely.

Swelling of the face, lips, tongue, or throat, difficulty swallowing or breathing (angioedema). Tamoxifeno Vir may cause or worsen symptoms of hereditary angioedema.

If you experience symptoms of blood clot formation such as swelling in the calf or leg, chest pain, shortness of breath, or sudden weakness. INTERRUPT administration of tamoxifeno and contact your doctor immediately.

Reporting of side effects

If you experience any type of side effect, consult your doctor or pharmacist, even if it is a possible side effect that does not appear in this leaflet. You can also report them directly through the Spanish System for the Vigilance of Medicinal Products for Human Use: https://www.notificaram.es. By reporting side effects, you can contribute to providing more information on the safety of this medicine.

5. Conservation of Tamoxifeno Vir

Keep this medication out of the sight and reach of children.

This medication does not require special storage conditions. Keep the tablets in the original packaging.

No requires special storage conditions.

Do not use this medication after the expiration date that appears on the packaging after CAD. The expiration date is the last day of the month indicated.

Medications should not be disposed of through drains or trash. Dispose of the packaging and medications you no longer need at the SIGRE collection point of the pharmacy. If in doubt, ask your pharmacist how to dispose of the packaging and medications you no longer need. By doing so, you will help protect the environment.

6. Additional Information

Tamoxifeno Vir Composition

The active ingredient is tamoxifen. Each tablet contains 20 mg of tamoxifen (as citrate).

The other components are: calcium hydrogen phosphate, microcrystalline cellulose, sodium starch glycolate (type A) (gluten-free), povidone K25, magnesium stearate, anhydrous colloidal silica.

Product Appearance and Packaging Content

This medication is presented in the form of white, round, scored tablets in blister packs containing 30 or 60 tablets..

Only some package sizes may be marketed.

Marketing Authorization Holder and Responsible Manufacturer

Marketing Authorization Holder

Industria Química y Farmacéutica VIR, S.A.

C/Laguna 66-70.Polígono Industrial URTINSA II 28923 Alcorcón (Madrid)

(Spain)

Responsible Manufacturer

Excella GmbH

Nürnberger str. 12.

90537 Feucht (Germany).

Last Review Date of this Leaflet:May 2021

The detailed and updated information on this medication is available on the website of the Spanish Agency of Medicines and Medical Devices (AEMPS)http://www.aemps.gob.es/

Talk to a doctor online

Have questions about this medication or your symptoms? Connect with a licensed doctor for guidance and personalized care.

5.07 reviews
Doctor

Anna Moret

Dermatology18 years of experience

Dr. Anna Moret is a board-certified dermatologist and dermatovenereologist. She specialises in adult and pediatric dermatology, venereology, aesthetic skin care, and general medicine. Her consultations are evidence-based and tailored to each patient’s dermatological needs.

Dr. Moret provides expert evaluation and treatment for: • Skin conditions such as eczema, acne, rosacea, dermatitis, and psoriasis • Hair and scalp issues including hair loss, dandruff, and seborrheic dermatitis • Pediatric skin problems — from newborns to adolescents • Sexually transmitted infections (STIs) and dermatovenereology • Aesthetic concerns: skin ageing, non-invasive cosmetic treatments • Skin allergies and hypersensitivity reactions • Mole checks, lesion evaluation, and skin cancer screening • Skincare advice and personalised cosmeceutical routines

Combining dermatology with general medical knowledge, Dr. Moret offers comprehensive care that addresses both skin health and underlying conditions. She also holds certification from the Canadian Board of Aesthetic Medicine, ensuring an internationally aligned approach to aesthetic dermatology.

CameraBook a video appointment
5.043 reviews
Doctor

Alina Tsurkan

Family medicine12 years of experience

Dr. Alina Tsurkan is a licensed family medicine physician based in Portugal, offering online consultations for adults and children. She provides professional primary care, with a focus on prevention, accurate diagnosis, and long-term management of acute and chronic conditions.

Dr. Tsurkan supports patients with a wide range of health issues, including: • Respiratory infections: cold, flu, bronchitis, pneumonia, and lingering coughs • ENT conditions: sinusitis, tonsillitis, otitis (ear infections), sore throat, allergic rhinitis • Eye conditions: allergic or infectious conjunctivitis, red eyes, irritation • Digestive issues: acid reflux (GERD), gastritis, irritable bowel syndrome (IBS), constipation, bloating, nausea • Urinary and reproductive health: urinary tract infections (UTIs), cystitis, prevention of recurrent infections • Chronic diseases: hypertension, diabetes, thyroid disorders, elevated cholesterol, weight management • Neurological complaints: headaches, migraines, sleep disturbances, fatigue, general weakness • Women’s health: menstrual irregularities, perimenopausal symptoms, preventive screening • Children’s health: fever, infections, digestive issues, follow-ups, vaccination guidance

She also provides: • IMT medical certificates for driving licence exchange in Portugal • Personalised preventive care and wellness consultations • Interpretation of test results and medical reports • Follow-up care and medication review • Support in managing multiple coexisting conditions • Remote prescription management and medical documentation

Dr. Tsurkan’s approach is evidence-based and holistic. She works closely with each patient to develop an individualised care plan that addresses both symptoms and root causes. Her goal is to empower patients to take control of their health and maintain well-being through lifestyle adjustments, routine check-ups, and early intervention.

CameraBook a video appointment
5.078 reviews
Doctor

Andrei Popov

General medicine6 years of experience

Dr. Andrei Popov is a licensed pain management specialist and general practitioner based in Spain. He provides expert online care for adults dealing with both chronic and acute pain, as well as a wide range of everyday health concerns.

He specialises in diagnosing and treating pain conditions that affect quality of life, including: • Chronic pain lasting more than 3 months • Migraines and recurring headaches • Neck, back, lower back, and joint pain • Post-traumatic pain following injury or surgery • Nerve-related pain, fibromyalgia, and neuralgia In addition to pain management, Dr. Popov helps patients with: • Respiratory infections (colds, bronchitis, pneumonia) • High blood pressure and metabolic conditions such as diabetes • Preventive care and routine health check-ups

Online consultations last up to 30 minutes and include a detailed symptom review, personalised treatment planning, and medical follow-up when needed.

Dr. Popov’s approach is rooted in evidence-based medicine, combined with individualised care tailored to each patient’s history, lifestyle, and clinical needs.

CameraBook a video appointment
5.017 reviews
Doctor

Yevgen Yakovenko

General surgery11 years of experience

Dr. Yevgen Yakovenko is a licensed surgeon and general practitioner in Spain and Germany. He specialises in general, paediatric, and oncological surgery, internal medicine, and pain management. He offers online consultations for adults and children, combining surgical precision with therapeutic support. Dr Yakovenko works with patients across different countries and provides care in Ukrainian, Russian, English, and Spanish.

Areas of medical expertise: • Acute and chronic pain: headaches, muscle and joint pain, back pain, abdominal pain, postoperative pain. Identifying the cause, selecting treatment, and creating a care plan. • Internal medicine: heart, lungs, gastrointestinal tract, urinary system. Management of chronic conditions, symptom control, second opinions. • Pre- and postoperative care: risk assessment, decision-making support, follow-up after surgery, rehabilitation strategies. • General and paediatric surgery: hernias, appendicitis, congenital conditions, both planned and urgent surgeries. • Injuries and trauma: bruises, fractures, sprains, soft tissue damage, wound care, dressing, referral when in-person care is required. • Oncological surgery: diagnosis review, treatment planning, and long-term follow-up. • Imaging interpretation: analysis of ultrasound, CT, MRI, and X-ray results, surgical planning based on imaging data. • Second opinions and medical navigation: clarifying diagnoses, reviewing current treatment plans, helping patients choose the best course of action.

Experience and qualifications: • 12+ years of clinical experience in university hospitals in Germany and Spain • International education: Ukraine – Germany – Spain • Member of the German Society of Surgeons (BDC) • Certified in radiological diagnostics and robotic surgery • Active participant in international medical conferences and research

Dr Yakovenko explains complex topics in a clear, accessible way. He works collaboratively with patients to analyse health issues and make evidence-based decisions. His approach is grounded in clinical excellence, scientific accuracy, and respect for each individual.

If you are unsure about a diagnosis, preparing for surgery, or want to discuss your test results – Dr Yakovenko will help you evaluate your options and move forward with confidence.

CameraBook a video appointment
See all doctors

Stay informed and save on care

Get health tips, platform updates, and exclusive promos for subscribers.

Follow us on social media
FacebookInstagramTikTok