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THORENS 25,000 IU HARD CAPSULES

Ask a doctor about a prescription for THORENS 25,000 IU HARD CAPSULES

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Doctor

Anna Biriukova

General medicine5 years of experience

Dr Anna Biriukova is an internal medicine doctor with clinical experience in cardiology, endocrinology, and gastroenterology. She provides online consultations for adults, offering expert medical support for heart health, hormonal balance, digestive issues, and general internal medicine.

Cardiology – Diagnosis and treatment of:

  • High blood pressure, blood pressure fluctuations, and cardiovascular risk prevention.
  • Chest pain, shortness of breath, arrhythmias (tachycardia, bradycardia, palpitations).
  • Leg swelling, chronic fatigue, reduced exercise tolerance.
  • EKG interpretation, lipid profile evaluation, cardiovascular risk assessment (heart attack, stroke).
  • Post-COVID-19 cardiac monitoring and care.
Endocrinology – Diabetes, thyroid, metabolism:
  • Diagnosis and management of type 1 and type 2 diabetes, and prediabetes.
  • Individual treatment plans including oral medications and insulin therapy.
  • GLP-1 therapy– modern pharmacological treatment for weight management and diabetes control, including drug selection, monitoring, and safety follow-up.
  • Thyroid disorders – hypothyroidism, hyperthyroidism, autoimmune thyroid diseases (Hashimoto’s, Graves’ disease).
  • Metabolic syndrome – obesity, lipid disorders, insulin resistance.
Gastroenterology – Digestive health:
  • Abdominal pain, nausea, heartburn, gastroesophageal reflux (GERD).
  • Stomach and intestinal conditions: gastritis, irritable bowel syndrome (IBS), indigestion.
  • Management of chronic digestive disorders and interpretation of tests (endoscopy, ultrasound, labs).
General internal medicine and preventive care:
  • Respiratory infections – cough, colds, bronchitis.
  • Lab test analysis, therapy adjustments, medication management.
  • Adult vaccinations – planning, contraindications assessment.
  • Cancer prevention – screening strategies and risk assessment.
  • Holistic approach – symptom relief, complication prevention, and quality of life improvement.
Dr Biriukova combines internal medicine with specialist insight, offering clear explanations, personalised treatment plans, and comprehensive care tailored to each patient.
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This page is for general information. Consult a doctor for personal advice. Call emergency services if symptoms are severe.
About the medicine

How to use THORENS 25,000 IU HARD CAPSULES

Introduction

Package Leaflet: Information for the User

Thorens 25,000 IU Hard Capsules

Colecalciferol (Vitamin D3)

Read the entire package leaflet carefully before starting to take this medication, as it contains important information for you.

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

Contents of the Package Leaflet

  1. What Thorens is and what it is used for
  2. What you need to know before taking Thorens
  3. How to take Thorens
  4. Possible side effects
  5. Storage of Thorens

Contents of the pack and additional information

1. What Thorens is and what it is used for

Thorens contains the active ingredient colecalciferol (Vitamin D3). Vitamin D3 can be found in some foods and is produced by the body when the skin is exposed to sunlight. Vitamin D promotes calcium absorption in the kidneys and intestines, helping to form bone. Vitamin D deficiency is the main cause of rickets (inadequate mineralization of bones in children) and osteomalacia (inadequate mineralization of bones in adults).

Thorens hard capsules are used to prevent and treat vitamin D deficiency in adults.

2. What you need to know before taking Thorens

Do not take Thorens:

  • if you are allergic to Vitamin D3 or any of the other ingredients of this medication (listed in section 6);
  • if you have high levels of calcium in the blood (hypercalcemia) or urine (hypercalciuria);
  • if you have kidney stones (renal calculi) or severe kidney failure;
  • if you have high levels of vitamin D in the blood (hypervitaminosis D).

Warnings and precautions

Consult your doctor, pharmacist, or nurse before taking Thorens if you:

  • are being treated with certain medications for heart conditions (e.g., cardiac glycosides, such as digoxin).
  • have sarcoidosis (an autoimmune disease that can cause increased vitamin D levels in the body).
  • are being treated with diuretics (e.g., benzothiadiazine)
  • are immobilized
  • have pseudohypoparathyroidism
  • are being treated with medications that contain vitamin D, or take foods or milk enriched with vitamin D.
  • are likely to be exposed to a lot of sunlight while using Thorens
  • take other supplements that contain calcium. Your doctor should monitor your blood calcium levels to ensure they are not too high during your treatment with Thorens.
  • have kidney disease or kidney damage and have a tendency to form kidney stones. Your doctor may want to monitor your blood and urine calcium levels.
  • your doctor should monitor your blood calcium levels through laboratory tests if your daily intake of vitamin D3 exceeds 1,000 IU for an extended period.

Children and adolescents.

The use of Thorens is not recommended in children and adolescents under 18 years of age.

Other medications and Thorens

Tell your doctor or pharmacist if you are using, have recently used, or might use any other medication. This is especially important if you are taking:

  • medications used to treat heart or kidney diseases, such as cardiac glycosides (e.g., digoxin) or diuretics (e.g., bendroflumethiazide). When these medications are used at the same time as vitamin D3, they can cause a significant increase in blood and urine calcium levels.
  • medications that contain vitamin D or foods rich in vitamin D, such as some types of milk enriched with vitamin D.
  • actinomycin (a medication used to treat certain types of cancer) and imidazole antifungals (e.g., clotrimazole and ketoconazole, which are medications used to treat fungal diseases). These medications can interfere with the processing of vitamin D3 in the body.
  • medications used to treat tuberculosis, such as rifampicin and isoniazid
  • the following medications, as they may interfere with the effect or absorption of vitamin D3:
    • antiepileptic medications (anticonvulsants), barbiturics;
    • glucocorticoids (steroid hormones such as hydrocortisone or prednisolone), as they may reduce the effect of vitamin D3;
    • medications that lower cholesterol levels in the blood (such as cholestyramine or colestipol);
    • certain medications used for weight loss by reducing fat absorption (e.g., orlistat);
    • certain laxatives (such as liquid paraffin).

Taking Thorens with food, drinks, and alcohol

You should take Thorens preferably with food to help with the absorption of vitamin D3.

Pregnancy, breastfeeding, and fertility

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

This high concentration is not recommended for use in pregnant or breastfeeding women.

Driving and using machines

Information on the possible effects of this medication on the ability to drive is limited. However, it is not expected to affect your ability to drive or use machines.

3. How to take Thorens

Follow the instructions for administration of the medication contained in this package leaflet or as indicated by your doctor or pharmacist. If you have any doubts, ask your doctor or pharmacist.

The capsule should be swallowed whole (e.g., with water)

Thorens should be taken preferably with food.

Use in adults

The recommended dose is one 25,000 IU capsule per week for the first month. After the first month, the dose may be reduced.

This initial treatment may be followed by maintenance therapy, as indicated by your doctor.

Your doctor will adjust the dose for you.

Pediatric population

Thorens is not recommended in children and adolescents under 18 years of age.

Pregnancy and breastfeeding

Thorens is not recommended.

If you take more Thorens than you should

If you take more than the prescribed amount, stop taking the medication and call your doctor. If you cannot contact your doctor, go to the emergency department of the nearest hospital and take the medication package with you.

You can also contact the Toxicology Information Service, phone 915620420, indicating the medication and the amount taken.

The most common symptoms of overdose are: nausea, vomiting, excessive thirst, excessive urine production for 24 hours, constipation, dehydration, and high levels of calcium in the blood and urine (hypercalcemia and hypercalciuria) determined by clinical tests.

If you forget to take Thorens

If you forget to take a dose of Thorens, take the next missed dose as soon as possible. Then, take the next dose at the usual time. However, if it is close to the time of the next dose, do not take the missed dose and take the next dose at the usual time.

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

4. Possible side effects

Like all medications, Thorens can cause side effects, although not everyone gets them.

The possible side effects associated with the use of Thorens may be:

Uncommon(affect up to 1 in 100 people):

  • Excess calcium in the blood (hypercalcemia)
  • Excess calcium in the urine (hypercalciuria)

Rare(affect up to 1 in 1,000 people):

  • Skin rash (hives or skin eruption)
  • Itching (pruritus)
  • Urticaria

Reporting side effects

If you experience any side effects, consult your doctor or pharmacist, even if they are not listed in this package leaflet. You can also report them directly through the Spanish Medication Surveillance System for Human Use: https://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medication.

5. Storage of Thorens

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

Do not use this medication after the expiration date shown on the package after CAD. The expiration date is the last day of the month indicated.

Do not store above 30 °C.

Keep in the original package to protect from light.

Do not refrigerate or freeze.

Medications should not be disposed of through wastewater or household waste. Deposit the packages and medications you no longer need at the SIGRE collection point in your pharmacy. If you have any doubts, ask your pharmacist how to dispose of the packages and medications you no longer need. This will help protect the environment.

6. Contents of the pack and additional information

Composition of Thorens

  • The active ingredient is colecalciferol (Vitamin D3).

One capsule contains: 0.625 mg of colecalciferol (Vitamin D3) equivalent to 25,000 IU.

  • The other excipients are:
  • Refined olive oil,
  • Gelatin,
  • Titanium dioxide (E-171),
  • Yellow iron oxide (E-172),
  • Black iron oxide (E-172).

Appearance of the product and contents of the pack

Thorens 25,000 IU is a hard capsule with a transparent body and white cap, with a green band. The capsule size is 15.9 mm x 5.8 mm. It contains an oily solution and is supplied in aluminum PVC/PVDC blisters in cardboard boxes.

Each box may contain 3, 4, 8, 12, or 40 capsules.

Only certain pack sizes may be marketed.

Marketing authorization holder and manufacturer

Marketing authorization holder

Laboratorios Effik, S.A.

c/ San Rafael, 3

28108 Alcobendas, (Madrid)

Spain

Manufacturer

Abiogen Pharma S.p.A.

Via Meucci, 36

Pisa (Italy)

This medication is authorized in the Member States of the European Economic Area under the following names:

Date of the last revision of this package leaflet:March 2019

Detailed information on this medication is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) (http://www.aemps.gob.es/).

About the medicine

How much does THORENS 25,000 IU HARD CAPSULES cost in Spain ( 2025)?

The average price of THORENS 25,000 IU HARD CAPSULES in December, 2025 is around 9.37 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.

Alternatives to THORENS 25,000 IU HARD CAPSULES in other countries

The best alternatives with the same active ingredient and therapeutic effect.

Alternative to THORENS 25,000 IU HARD CAPSULES in Польща

Dosage form: Краплі, 500 мкг/мл (20 000 МО/мл)
Active substance: colecalciferol
Marketing authorisation holder (MAH): P&G Health Germany GmbH
Prescription not required
Dosage form: Краплі, 500 мкг/мл (20 000 МО/мл)
Active substance: colecalciferol
Marketing authorisation holder (MAH): P&G Health Germany GmbH
Prescription not required
Dosage form: Краплі, 500 мкг/мл (20 000 МО/мл)
Active substance: colecalciferol
Marketing authorisation holder (MAH): P&G Health Germany GmbH
Prescription not required
Dosage form: Капсули, 50 000 МО
Active substance: colecalciferol
Dosage form: Капсули, 20000 МО
Active substance: colecalciferol
Importer: Flavine Pharma France
Prescription not required
Dosage form: Таблетки, 30 000 МО
Active substance: colecalciferol
Importer: ITC Production S.r.l.
Prescription required

Alternative to THORENS 25,000 IU HARD CAPSULES in Україна

Dosage form: капсули, 4000 МО по 15 капсул
Active substance: colecalciferol
Dosage form: капсули, 2000 МО, по 15 капсул у блістері
Active substance: colecalciferol
Dosage form: капсули, 10000 МО по 15 капсул
Active substance: colecalciferol
Dosage form: капсули, 50000 МО; по 2 капсули у блістері
Active substance: colecalciferol
Prescription required
Dosage form: краплі, 20000 МО/мл
Active substance: colecalciferol
Prescription required
Dosage form: таблетки, по 500 МО
Active substance: colecalciferol
Prescription not required

Online doctors for THORENS 25,000 IU HARD CAPSULES

Discuss dosage, side effects, interactions, contraindications, and prescription renewal for THORENS 25,000 IU HARD CAPSULES – subject to medical assessment and local rules.

5.0(8)
Doctor

Mar Tabeshadze

Endocrinology10 years of experience

Dr. Mar Tabeshadze is a licensed endocrinologist and general practitioner in Spain. She provides online consultations for adults, offering medical support for a wide range of endocrine conditions and related health concerns.

  • Diagnostic consultations for suspected endocrine disorders
  • Management of thyroid conditions, including in pregnant women
  • Early detection and treatment of type 1 and type 2 diabetes, with personalised therapy plans
  • Obesity treatment: identifying underlying causes of weight gain, combining medication and non-pharmacological strategies, and long-term support
  • Diagnosis and treatment of endocrine-related skin, hair, and nail issues
  • Ongoing care for patients with osteoporosis, pituitary, and adrenal gland disorders
Dr. Tabeshadze takes a patient-centred approach based on evidence-based medicine. Her goal is to help patients achieve hormonal balance, manage chronic conditions effectively, and improve overall well-being through targeted, personalised care.
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Doctor

Anna Biriukova

General medicine5 years of experience

Dr Anna Biriukova is an internal medicine doctor with clinical experience in cardiology, endocrinology, and gastroenterology. She provides online consultations for adults, offering expert medical support for heart health, hormonal balance, digestive issues, and general internal medicine.

Cardiology – Diagnosis and treatment of:

  • High blood pressure, blood pressure fluctuations, and cardiovascular risk prevention.
  • Chest pain, shortness of breath, arrhythmias (tachycardia, bradycardia, palpitations).
  • Leg swelling, chronic fatigue, reduced exercise tolerance.
  • EKG interpretation, lipid profile evaluation, cardiovascular risk assessment (heart attack, stroke).
  • Post-COVID-19 cardiac monitoring and care.
Endocrinology – Diabetes, thyroid, metabolism:
  • Diagnosis and management of type 1 and type 2 diabetes, and prediabetes.
  • Individual treatment plans including oral medications and insulin therapy.
  • GLP-1 therapy– modern pharmacological treatment for weight management and diabetes control, including drug selection, monitoring, and safety follow-up.
  • Thyroid disorders – hypothyroidism, hyperthyroidism, autoimmune thyroid diseases (Hashimoto’s, Graves’ disease).
  • Metabolic syndrome – obesity, lipid disorders, insulin resistance.
Gastroenterology – Digestive health:
  • Abdominal pain, nausea, heartburn, gastroesophageal reflux (GERD).
  • Stomach and intestinal conditions: gastritis, irritable bowel syndrome (IBS), indigestion.
  • Management of chronic digestive disorders and interpretation of tests (endoscopy, ultrasound, labs).
General internal medicine and preventive care:
  • Respiratory infections – cough, colds, bronchitis.
  • Lab test analysis, therapy adjustments, medication management.
  • Adult vaccinations – planning, contraindications assessment.
  • Cancer prevention – screening strategies and risk assessment.
  • Holistic approach – symptom relief, complication prevention, and quality of life improvement.
Dr Biriukova combines internal medicine with specialist insight, offering clear explanations, personalised treatment plans, and comprehensive care tailored to each patient.
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Maryna Kuznetsova

Cardiology16 years of experience

Dr Marina Kuznetsova is an internal medicine doctor and cardiologist with a PhD in medicine. She provides online consultations for adults with chronic and acute conditions, with a strong focus on cardiovascular health. Her approach is based on current clinical guidelines and evidence-based treatment strategies.

Areas of expertise:

  • dyslipidaemia and lipid metabolism disorders
  • prevention and management of atherosclerosis
  • blood pressure monitoring and antihypertensive therapy
  • arrhythmias: diagnosis, follow-up, and treatment adjustment
  • cardiovascular care and recovery support after Covid-19
Dr Kuznetsova helps patients manage cardiovascular risk factors, optimise long-term treatment, and gain clarity in complex health situations – all through accessible and structured online care.
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Antonio Cayatte

General medicine43 years of experience

Dr Antonio Cayatte is a physician in General and Acute Medicine with over 30 years of experience across clinical care, medical research, and education. He offers online consultations for adults with a wide range of symptoms, both acute and chronic.

His clinical background includes:

  • assessment of sudden or unclear symptoms
  • ongoing care for chronic conditions
  • follow-up after hospital discharge
  • interpretation of test results
  • medical support while abroad
Dr Cayatte earned his degree from the University of Lisbon and taught internal medicine at Boston University School of Medicine. He holds active medical registrations in both Portugal and the UK and is a Fellow of the American Heart Association.

Consultations are available in English and Portuguese. Patients value his clarity, professionalism, and balanced approach to evidence-based care.

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Lina Travkina

Family medicine12 years of experience

Dr. Lina Travkina is a licensed family and preventive medicine doctor based in Italy. She provides online consultations for adults and children, supporting patients across all stages of care – from acute symptom management to long-term health monitoring and prevention.

Areas of medical care include:

  • Respiratory conditions: colds, flu, acute and chronic bronchitis, mild to moderate pneumonia, bronchial asthma.
  • ENT and eye conditions: sinusitis, tonsillitis, pharyngitis, otitis, infectious and allergic conjunctivitis.
  • Digestive issues: gastritis, acid reflux (GERD), IBS, dyspepsia, bloating, constipation, diarrhoea, functional bowel symptoms, intestinal infections.
  • Urological and infectious diseases: acute and recurrent cystitis, bladder and kidney infections, prevention of recurrent UTIs, asymptomatic bacteriuria.
  • Chronic conditions: hypertension, diabetes, hypercholesterolemia, metabolic syndrome, thyroid disorders, excess weight.
  • Neurological and general symptoms: headache, migraine, dizziness, fatigue, sleep disturbances, reduced concentration, anxiety, asthenia.
  • Chronic pain support: back, neck, joint, and muscle pain, tension syndromes, pain associated with osteochondrosis and chronic conditions.

Additional care areas:

  • Preventive consultations and check-up planning.
  • Medical advice and follow-up consultations.
  • Test interpretation and diagnostic guidance.
  • Structured support for undiagnosed complaints.
  • Second opinion on diagnoses and treatment plans.
  • Nutritional and lifestyle support for vitamin deficiencies, anaemia, metabolic issues.
  • Post-operative recovery support and pain management.
  • Preconception counselling and postpartum support.
  • Immunity support and strategies to reduce frequency of infections.

Dr. Travkina combines evidence-based medicine with an attentive, personalised approach. Her consultations focus not only on treatment, but also on prevention, recovery, and long-term wellbeing.

If during the consultation it becomes clear that your case requires in-person assessment or specialised care outside of her scope, the session will be terminated and the payment fully refunded.

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Dmytro Horobets

Family medicine6 years of experience

Dr. Dmytro Horobets is a licensed family medicine physician in Poland, specialising in endocrinology, diabetology, obesity management, gastroenterology, pediatrics, general surgery, and pain medicine. He offers online consultations for adults and children, providing personalised medical support for a wide range of acute and chronic health concerns.

Areas of expertise:

  • Endocrinology: diabetes type 1 and type 2, prediabetes, thyroid disorders, metabolic syndrome, hormonal imbalance.
  • Obesity medicine: structured weight management plans, nutritional counselling, obesity-related health risks.
  • Gastroenterology: acid reflux (GERD), gastritis, irritable bowel syndrome (IBS), liver and biliary conditions.
  • Pediatric care: infections, respiratory symptoms, digestive issues, growth and development monitoring.
  • General surgery support: pre- and post-surgical consultations, wound care, rehabilitation.
  • Pain management: chronic and acute pain, back pain, joint pain, post-traumatic pain syndromes.
  • Cardiovascular health: hypertension, cholesterol control, risk assessment for heart disease.
  • Preventive medicine: regular check-ups, health screenings, long-term management of chronic conditions.

Dr. Horobets combines evidence-based medicine with a patient-centred approach. He carefully evaluates each patient’s medical history and symptoms, offering clear explanations and structured treatment plans adapted to individual needs.

Whether you need help managing diabetes, tackling weight-related health issues, interpreting lab results, or receiving general family medicine support, Dr. Horobets provides professional online care tailored to your specific health goals.

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Alexandra Alexandrova

General medicine8 years of experience

Dr Alexandra Alexandrova is a licensed general medicine doctor in Spain, specialising in trichology, nutrition, and aesthetic medicine. She offers online consultations for adults, combining a therapeutic approach with personalised care for hair, scalp, and overall health.

Areas of expertise:

  • Hair loss in women and men, postpartum hair loss, androgenetic and telogen effluvium.
  • Scalp conditions: seborrheic dermatitis, psoriasis, scalp irritation, dandruff.
  • Chronic conditions: hypertension, diabetes, metabolic disorders.
  • Online trichology consultation: customised treatment plans, nutritional support, hair growth stimulation.
  • Hair loss prevention: hormonal imbalance, stress factors, haircare strategies.
  • Routine health check-ups, prevention of cardiovascular and metabolic diseases.
  • Personalised nutritional advice to improve hair strength, skin health, and hormonal balance.
  • Aesthetic medicine: non-invasive strategies to enhance skin quality, tone, and metabolic wellness.

Dr Alexandrova follows an evidence-based and holistic approach: online consultations with a therapist and trichologist on Oladoctor provide professional support for hair, scalp, and overall health — all from the comfort of your home.

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