Allopurinol Teva 100 mg tablets EFG

Package leaflet: Information for the user

Introduction

Package leaflet: information for the user

Alopurinol Teva 100 mg tablets EFG

Read the entire 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 only and must not be given to other people, even if they have the same symptoms as you, because it could harm them.
• If you experience any adverse reactions, consult your doctor or pharmacist, even if they are adverse reactions not listed in this leaflet. See section 4.

Leaflet contents

1. What Alopurinol Teva is and what it is used for
2. What you need to know before taking Alopurinol Teva
3. How to take Alopurinol Teva
4. Possible adverse effects
5. How to store Alopurinol Teva
6. Contents of the pack and other information

1. What Alopurinol Teva is and what it is used for

Alopurinol belongs to a group of medicines called enzyme inhibitors, which work by controlling the rate at which a specific chemical process occurs in the body. In this case, the result is a reduction in the level of uric acid in plasma and urine.

This medicine is used to prevent the occurrence of gout and other conditions caused by excess uric acid in the body, such as kidney stones and certain types of renal or metabolic disorders.

2. What you need to know before taking Alopurinol Teva

Serious skin reactions (hypersensitivity syndrome, Stevens-Johnson syndrome, toxic epidermal necrolysis) have been reported with the use of allopurinol. Frequently, the rash may include ulcers in the mouth, throat, nose, genitals, and conjunctivitis (inflammation and redness of the eyes). These severe skin rashes are often preceded by flu-like symptoms such as fever, headache, and body pain. The rash may progress to blistering and widespread skin peeling. These serious skin reactions may be more common in people of Han Chinese, Thai, or Korean descent. Additionally, the risk of chronic kidney failure may increase in these patients. If you develop a skin rash or these skin symptoms, stop taking allopurinol and consult your doctor immediately.

Do not take Alopurinol Teva

• if you are allergic to the active substance or to any of the other components of this medicine (listed in section 6).

Warnings and precautions

Talk to your doctor or pharmacist before taking Alopurinol

• if you are experiencing an acute attack of gout.
• if you are pregnant, think you may be pregnant, or are breastfeeding.
• if you have or have had any kidney or liver disease.
• if you are taking or are about to start taking any medicines for heart conditions or high blood pressure.
• if you notice that you bruise more easily than before, or if you develop a sore throat or other signs of infection.
• if you develop a skin rash, skin peeling, blisters or sores in the lips or mouth, wheezing (whistling breath), palpitations or chest tightness, or loss of consciousness: THESE SYMPTOMS MAY INDICATE THAT YOU ARE ALLERGIC to allopurinol. Stop your treatment and contact your doctor immediately.

Life-threatening skin rashes (Stevens-Johnson syndrome and toxic epidermal necrolysis) associated with allopurinol initially appear as red spots or circular patches, often with a central blister.

The period of highest risk for severe skin reactions is during the first weeks of treatment.

If you develop Stevens-Johnson syndrome or toxic epidermal necrolysis while using allopurinol, you must never use this medicine again.

If you are unsure, consult your doctor.

You should stop your treatment and contact your doctor as soon as possible if, while taking this medicine, you experience any of the following symptoms:

• High fever.
• Joint pain or painful swelling of the groin, armpits, or neck.
• Jaundice (yellowing of the skin and eyes).
• Nausea or vomiting (which may contain blood).
• General feeling of discomfort.
• Weakness, numbness, or loss of consciousness.
• Headache, drowsiness, dizziness, vision disturbances.
• Chest pain, high blood pressure, or slow pulse.
• Swelling (edema) of the ankles.
• Feeling thirsty, tiredness, and weight loss.
• Appearance of boils.
• Blood in the urine.

It is possible that starting treatment with this medicine may trigger an acute attack of gout. Your doctor may recommend taking certain medicines to prevent this. If a gout attack occurs, it is not necessary to stop treatment with this medicine, provided that an appropriate anti-inflammatory medicine is used at the same time.

Children

Use in children is rarely indicated, except in certain types of cancer (especially leukemia) and certain enzymatic disorders such as Lesch-Nyhan syndrome.

Taking Alopurinol Teva with other medicines

Inform your doctor or pharmacist if you are using or have recently used any other medicines, including those obtained without a prescription.

It is especially important that you inform your doctor if you are taking any of the medicines listed below. Your doctor may need to reduce the dose of your medicine or monitor you more closely, as there is an increased risk of side effects when allopurinol is taken together with:

• 6-mercaptopurine (used to treat blood cancer).
• Azathioprine, cyclosporine (used to suppress the immune system). Note that adverse effects of cyclosporine may occur more frequently.
• Vidarabine (used in the treatment of herpes). Note that adverse effects of vidarabine may occur more frequently. Exercise special caution if this occurs.
• Salicylates (used to reduce pain, fever, or inflammation; e.g., aspirin).
• Probenecid and uricosuric medicines (used to treat gout).
• Chlorpropamide (used to treat diabetes). A dose reduction of chlorpropamide may be necessary, especially in patients with reduced kidney function.
• Warfarin, phenprocoumon, acenocoumarol (anticoagulants). Your doctor will monitor your blood test results more frequently and, if necessary, reduce the dose of these medicines.
• Phenytoin (used to treat epilepsy).
• Theophylline (used to treat asthma and other respiratory diseases). Your doctor will measure theophylline blood levels, especially when starting allopurinol treatment or after any dose adjustment.
• Ampicillin or amoxicillin (used to treat bacterial infections). Whenever possible, patients should receive other antibiotics, as allergic reactions are more likely to occur.
• Medicines used to treat aggressive tumors such as:
  • Cyclophosphamide
  • Doxorubicin
  • Bleomycin
  • Procarbazine
  • Mechlorethamine

Your doctor will frequently monitor your blood tests.

• Didanosine (used to treat HIV infection)
• ACE inhibitors (e.g., captopril) or diuretics (used to treat high blood pressure). The risk of skin reactions may increase, especially in patients with chronic impairment of kidney function.

The concomitant administration of 6-mercaptopurine or azathioprine with allopurinol should be avoided. When 6-mercaptopurine or azathioprine are administered together with allopurinol, the dose of 6-mercaptopurine or azathioprine must be reduced because their activity is prolonged. This could increase the risk of serious blood disorders. In such cases, your doctor will closely monitor your blood count during treatment.

Seek immediate medical attention if you notice unexplained bruising, bleeding, fever, or sore throat.

If aluminum hydroxide is taken concomitantly, allopurinol may have a reduced effect; therefore, it is advisable to leave an interval of at least 3 hours between taking the two medicines.

When allopurinol is administered in combination with cytostatic agents (e.g., cyclophosphamide, doxorubicin, bleomycin, procarbazine, alkylating halides), blood dyscrasias occur more frequently than when these active substances are administered alone.

Therefore, periodic hematological monitoring should be performed.

Pregnancy, breastfeeding, and fertility

This medicine is not recommended if you are pregnant. Allopurinol passes into breast milk. The use of allopurinol during breastfeeding is not recommended.

Consult your doctor or pharmacist before using any medicine.

Driving and use of machines

Due to its side effects (drowsiness, dizziness, and impaired coordination), this medicine may impair your ability to drive.

Do not drive or operate tools or machinery until you are reasonably certain that the medicine does not impair your capabilities.

Alopurinol Teva contains lactose and sodium

If your doctor has informed you that you have an intolerance to certain sugars, consult with him before taking this medicine.

This medicine contains less than 1 mmol of sodium (23 mg) per tablet; this is essentially “sodium-free”.

3. How to take Alopurinol Teva

Follow exactly the instructions for using this medicine as given by your doctor. If you have any doubts, consult your doctor or pharmacist again.

For oral use only.

The tablet may be divided into equal doses.

The tablets can be taken directly or split in half with the help of a little water. It is usually taken once daily, generally after a meal.

Typically, your doctor will start treatment with a low dose of allopurinol (e.g., 100 mg/day) to reduce the risk of possible adverse effects. Your dose may be increased if necessary.

The recommended dose is:

Adults:

The recommended starting dose is 100 to 300 mg. The dose may be increased up to 900 mg per day, depending on your condition. In such cases, and if stomach discomfort occurs, it is recommended to divide the dose into several doses per day and take them with food.

Children under 15 years of age:

The recommended dose of this medicine in children is 100 to 400 mg daily.

Elderly:

Your doctor will recommend the lowest possible dose of allopurinol to reduce uric acid levels and control your symptoms.

Use in patients with impaired liver or kidney function:

If you have liver or kidney problems, your doctor will prescribe the lowest possible dose of allopurinol that achieves reduction of uric acid levels and controls your symptoms. In case of kidney insufficiency, your doctor may advise you to take less than 100 mg per day or to take single 100 mg doses at intervals longer than one day. If you are on dialysis two or three times a week, your doctor may prescribe a dose of 300–400 mg immediately after each dialysis session.

If you take more Alopurinol Teva than you should

In this case, contact the Toxicology Information Service. Telephone 91 562 04 20, or consult your doctor.

In the event of accidental ingestion of a large amount of medicine, go immediately to your doctor or the nearest hospital emergency department. Bring this leaflet with you.

If you forget to take Alopurinol Teva

If you forget to take a dose, take it as soon as you remember. Then continue taking it as before. Do not take a double dose to make up for forgotten doses.

If you miss several doses, it is best to contact your doctor so that he or she can decide what you should do from that point onward.

If you stop taking Alopurinol Teva

Your doctor will advise you on the duration of treatment with allopurinol. Do not stop treatment earlier, even if you feel better.

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

4. Possible adverse effects

Like all medicines, this medicine can cause adverse effects, although not everyone will experience them.

The likelihood of adverse effects occurring is higher when there are renal and/or hepatic impairments.

.

The frequency of adverse effects is classified as follows:

Very common (affects less than 1 in 10 people)
Common (affects less than 1 in 100 people)
Uncommon (affects less than 1 in 1,000 people)
Rare (affects less than 1 in 10,000 people)
Very rare (affects less than 1 in 10,000 people)
Frequency not known (cannot be estimated from available data)

Infections and infestations

Very rare: Infection of the hair follicle

Disorders of the blood and lymphatic system

Very rare: Decrease in the number of white blood cells: leucopenia (increases the risk of infections), red blood cells: anaemia (may cause tiredness, fatigue), platelets (cells involved in blood clotting, leading to bruising or bleeding more easily than usual).

Occasionally, allopurinol tablets may cause blood-related effects manifested by increased bruising, sore throat, or other signs of infection. These effects usually occur in people with renal or hepatic problems. Inform your doctor as soon as possible if you experience any of these symptoms.

Immune system disorders

Uncommon: Hypersensitivity reactions (allergy: possible appearance of skin rash, skin peeling, blisters or sores in the lips or mouth).

Rare: Severe hypersensitivity reactions, associated with exfoliation, fever, joint pain, or painful swelling of the lymph nodes in the groin, armpits, or neck, jaundice (yellowing of the skin and eyes), and other skin and subcutaneous tissue disorders (see below).

Very rare: Angioimmunoblastic lymphadenopathy (characterized by weight loss, fever, and swollen lymph nodes in the armpits, neck, or groin), severe allergic reaction potentially leading to death.

Very rarely, seizures, wheezing (whistling breathing sounds), palpitations, chest tightness, or loss of consciousness may occur.

Metabolism and nutrition disorders

Very rare: Diabetes mellitus (elevated blood glucose levels), increased blood lipid levels, increased blood uric acid levels.

Psychiatric disorders

Very rare: Depression

Nervous system disorders

Very rare: Weakness, numbness, or loss of consciousness, paralysis, lack of motor coordination (inability to coordinate movements), altered normal sensation (neuropathy), tingling sensation (paraesthesiae), drowsiness, headache, altered taste.

Frequency not known: Aseptic meningitis (inflammation of the membranes surrounding the brain and spinal cord): symptoms include neck stiffness, headache, nausea, fever, or altered consciousness. If you experience any of these symptoms, seek urgent medical attention.

Eye disorders

Very rare: Cataracts, visual disturbances.

Frequency not known: Maculopathy

Ear and labyrinth disorders

Very rare: Vertigo

Cardiac disorders

Very rare: Chest pain or slow pulse (bradycardia).

Vascular disorders

Very rare: High blood pressure (hypertension)

Gastrointestinal disorders

Uncommon: Nausea, vomiting, diarrhoea

Very rare: Presence of blood in vomit, excess fat in stools, mouth infections, changes in bowel habits.

Hepatobiliary disorders

Uncommon: Asymptomatic increases in liver function tests.

Rare: Hepatitis

Frequency not known: Hepatic necrosis, granulomatous hepatitis

Skin and subcutaneous tissue disorders

Common: Skin rash

Very rare: Hives, drug-type skin rashes that may be life-threatening (Stevens-Johnson syndrome and toxic epidermal necrolysis) (see section 2), hair loss or discoloration, severe allergic reaction causing swelling of the face or throat.

Frequency not known: Lichenoid eruption (reddish-purple skin rash with itching or white-gray thread-like lines on mucous membranes), alopecia, Hypersensitivity syndrome (some cases with fatal outcome)

Renal and urinary disorders

Rare: Urinary tract stones

Very rare: Presence of blood in urine

Frequency not known: Azotemia (increased nitrogen-containing compounds such as urea and creatinine)

Reproductive system and breast disorders

Very rare: Male infertility, impotence, breast enlargement (gynaecomastia).

General disorders and administration site conditions

Very rare: Swelling (oedema) of the ankles, general malaise, fatigue, fever.

Musculoskeletal and connective tissue disorders

Very rare: Muscle pain

Investigations

Common: Elevated levels of thyroid-stimulating hormone in blood.

Frequency not known: Abnormal liver function test

If you experience any of the following symptoms, stop taking the medicine and inform your doctor immediately:

Rare (affects less than 1 in 1,000 people)

• Fever and chills, headache, muscle pain (flu-like symptoms), and general malaise.
• Any changes in your skin, for example, ulcers in the mouth, throat, nose, genitals, and conjunctivitis (inflammation and redness of the eyes), blisters or widespread skin peeling.
• Severe hypersensitivity reactions, with fever, skin rash, joint pain, and abnormalities in blood tests and liver function (these may be symptoms of multi-organ hypersensitivity disorder).

Very rare (may affect up to 1 in 10,000 patients)

• Occasionally, allopurinol tablets may cause blood-related effects manifested by increased bruising, sore throat, and other signs of infection. These effects usually occur in people with renal or hepatic problems. Inform your doctor as soon as possible if you experience any of these symptoms.
• Severe allergic reaction causing swelling of the face or throat.
• Severe, potentially life-threatening allergic reaction.

Cases of fever, with or without evident signs or symptoms of generalized hypersensitivity to allopurinol, have been reported (see Immune system disorders).

Do not be alarmed by this list of adverse reactions, as it is possible that none of them will occur in your case.

Reporting of adverse effects

If you experience any type of adverse effect, consult your doctor, pharmacist, or nurse, even if it is a possible adverse effect not listed in this leaflet. You can also report them directly via the Spanish Pharmacovigilance System for Human Medicines: https://www.notificaram.es. By reporting adverse effects, you can help provide more information on the safety of this medicine.

5. Storage of Allopurinol Teva

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

Do not use this medicine after the expiry date stated on the packaging after "EXP". The expiry date refers to the last day of the month indicated.

Do not use this medicine if you notice any visible signs of deterioration.

Medicines must not be disposed of via wastewater or household waste. Dispose of unused medicines and their containers at a pharmacy's SIGRE collection point. If in doubt, ask your pharmacist how to properly dispose of medicines and containers you no longer need. This will help protect the environment.

6. Contents of the pack and other information

Composition of Alopurinol Teva

• The active substance is allopurinol. Each tablet contains 100 mg of allopurinol.
• The other components are: monohydrate lactose, corn starch, sodium carboxymethylstarch (type A) (derived from potato), powdered cellulose (E-460), colloidal anhydrous silica, povidone (K-30), sodium lauryl sulfate, and magnesium stearate.

Appearance of Alopurinol Teva and contents of the pack

White, round, biconvex tablets, marked with "4K1 4K1" on one side and smooth on the other, with a score line on both sides. The tablet can be divided into equal doses.

It is available in packs of 25 and 100 tablets.

The pack of 25 tablets contains 5 blisters of 5 tablets and a package leaflet.

The pack of 100 tablets contains 10 blisters of 10 tablets and a package leaflet.

Marketing Authorization Holder

Teva Pharma, S.L.U.

C/ Anabel Segura, 11, Edificio Albatros B, 1st floor, Alcobendas

28108 Madrid

Spain

Manufacturer

Teva Pharmaceutical Works Private Limited Company

Pallagi Street 13, H-4042 Debrecen

Hungary

Date of the most recent review of this leaflet: August 2025

Detailed information on this medicinal product is available on the website of the Spanish Agency of Medicines and Medical Devices (AEMPS) http://www.aemps.gob.es/

You can access detailed and up-to-date information about this medicine by scanning with your mobile phone (smartphone) the QR code included in the packaging. You can also access this information at the following internet address: https://cima.aemps.es/cima/dochtml/p/69156/P_69156.html