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CEMIDON B6 150 MG/25 MG TABLETS

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About the medicine

How to use CEMIDON B6 150 MG/25 MG TABLETS

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This page provides general information and does not replace a doctor’s consultation. Always consult a doctor before taking any medication. Seek urgent medical care if symptoms are severe.

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Introduction

Package Leaflet: Information for the Patient

Cemidon B6150 mg/25 mg tablets

isoniazid/pyridoxine

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

  • Keep this leaflet, you may need to read it again.
  • If you have any further questions, ask your doctor or pharmacist.
  • This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
  • If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

Contents of the pack

  1. What is Cemidon B6 and what is it used for
  2. What you need to know before you take Cemidon B6
  3. How to take Cemidon B6
  4. Possible side effects
  5. Storage of Cemidon B6
  6. Contents of the pack and other information

1. What is Cemidon B6 and what is it used for

Cemidon B6 is a combination of two medicinal substances. It contains isoniazid, an antibiotic belonging to the group of antitubercular medicines, and vitamin B6.

Antibiotics are used to treat bacterial infections and are not effective against viral infections such as the flu or the common cold.

It is essential that you follow the instructions regarding dosage, intake, and treatment duration indicated by your doctor.

Do not store or reuse this medicine. If you have any leftover antibiotic after finishing the treatment, return it to the pharmacy for proper disposal. Do not throw away medicines via wastewater or household waste.

Cemidon B6 is indicated for the treatment of tuberculosis and, exceptionally, for the treatment of atypical mycobacterial infections.

Additionally, it is used for the prevention of:

  • Asymptomatic acute infection identified by tuberculin test.
  • People at risk of reactivating tuberculosis.
  • Contact with a person with tuberculosis.
Doctor consultation

Not sure if this medicine is right for you?

Discuss your symptoms and treatment with a doctor online.

2. What you need to know before you take Cemidon B6

Do not take Cemidon B6

  • If you are allergic to the active substances or to any of the other components of this medicine (listed in section 6).
  • If you have severe liver problems.
  • If you have ever suffered from a severe skin rash or peeling of the skin, blisters, and/or ulcers in the mouth after taking Cemidon.

Warnings and precautions

Consult your doctor or pharmacist before starting to take Cemidon B6.

Be particularly careful:

  • If you have a history of seizures or neurological problems. Medicines to prevent seizures should be administered in case of risk.
  • If you have any liver function disorder. In this case, your doctor will monitor your liver function weekly during the first month and then monthly while the treatment lasts. If any injury appears, your doctor will suspend the treatment.
  • If you have an alcohol addiction problem.
  • If you have any kidney disease. Your doctor will prescribe the most suitable dose for you.
  • There have been reports of severe skin reactions, such as: Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), drug reaction with eosinophilia and systemic symptoms (DRESS), acne, lymph node inflammation, and generalized acute pustular exanthema (GPEA) associated with Cemidon treatment. Stop taking Cemidon and seek immediate medical attention if you notice any of the symptoms described in section 4.

Other medicines and Cemidon B6

Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicines, including those without a prescription.

In particular, inform your doctor or pharmacist if you are using any of the following medicines:

  • Medicines used for the treatment of epilepsy (phenytoin, carbamazepine). Your doctor may adjust the dose of this medicine.
  • Aluminum salts (medicines for the treatment of gastric acidity). They should be taken with a separation of more than 2 hours between the intake of both products.
  • Halogenated anesthetics (medicines used in surgical interventions). It is recommended to interrupt the treatment with Cemidon one week before the intervention and not to restart it until 15 days have passed.
  • Oral anticoagulants (medicines used to prevent the formation of blood clots) such as acenocoumarol.
  • Glucocorticoids (such as prednisolone).
  • Ketoconazole (a medicine for the treatment of fungal infections). The intake of Cemidon should be spaced at least 12 hours apart. Your doctor may adjust the dose of the ketoconazole-based medicine.
  • Antibiotic medicines used for the treatment of tuberculosis (pyrazinamide, rifampicin) should increase clinical and biological monitoring.

Taking Cemidon B6with food, drinks, and alcohol

Isoniazid interacts with foods containing a substance called tyramine, which is present in foods such as cheese and red wine. Similarly, if taken with foods containing a substance called histamine (e.g., tuna or other tropical fish), it can cause an exaggerated response with headache, sweating, palpitations, flushing, and decreased blood pressure. Therefore, your doctor will indicate that you should not take foods containing tyramine or histamine during your treatment with Cemidon B6.

Pregnancy and breastfeeding

If you are pregnant or breastfeeding, think you may be pregnant, or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

In case of pregnancy, do not administer Cemidon B6 unless the potential benefits outweigh the possible risks associated with the treatment. Your doctor will make this assessment.

Breastfeeding women should consult their doctor before taking this medicine, as isoniazid passes into breast milk.

Driving and using machines

Cemidon B6 may affect your ability to drive or use machines, as it can cause blurred vision and/or dizziness.

Cemidon B6150 mg/25 mg tablets contain tartrazine.

This medicine may cause allergic reactions because it contains tartrazine. It can cause asthma, especially in patients allergic to acetylsalicylic acid.

3. How to take Cemidon B6

Follow exactly the administration instructions of this medicine indicated by your doctor or pharmacist. If in doubt, consult your doctor or pharmacist again.

The recommended dose is:

Adults and adolescents with a weight over 45 kg:

  • Treatment:
  • 5mg/kg daily up to a maximum of 300 mg.
  • or 10 mg/kg three times a week.
  • or 15 mg/kg twice a week.
  • Prevention: 300 mg daily, for at least six months.

Use in children and adolescents

  • Treatment in children and adolescents with a weight of 45 kg or less: the recommended dose is 10 mg/kg daily. The maximum daily dose should not exceed 300 mg.
  • Prevention in children under 5 years or immunodepressed: 7-15 mg/kg daily (maximum 300 mg), for at least six months.

There is no data available on the use of isoniazid in children under 3 months of age.

Method of administration

It is recommended to take the medicine in the morning on an empty stomach, at least 30 minutes before or 2 hours after meals.

The score line is only for breaking the tablet if you find it difficult to swallow it whole.

Due to its size, Cemidon tablets are not suitable for the treatment of adults, children, or adolescents who cannot swallow the tablets.

If you think the effect of Cemidon B6 is too strong or too weak, tell your doctor or pharmacist.

If you take more Cemidon B6than you should

If you have taken more Cemidon B6 than you should, consult your doctor or pharmacist immediately or call the Toxicology Information Service, phone: (91) 562 04 20, indicating the medicine and the amount ingested.

After an overdose of this medicine, you can expect the appearance of nausea, vomiting, dizziness, visual disturbances, or hallucinations, increased levels of acid in the body, appearance of acetone in urine, and high blood sugar levels. With higher doses, respiratory depression and central depression may occur, leading to convulsions and deep coma.

If you forget to take Cemidon B6

Do not take a double dose to make up for forgotten doses.

If you stop taking Cemidon B6

Your doctor will indicate the duration of your treatment with Cemidon B6. Do not stop the treatment before, even if you feel better. If you stop taking the treatment too soon, the infection could reappear.

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

Medicine questions

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4. Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Uncommon side effects(may affect up to 1 in 100 people):

  • Hepatitis (inflammation of the liver).

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

  • Toxic epidermal necrolysis (skin reaction that causes large areas of skin with blisters and peeling, potentially life-threatening), drug reaction with eosinophilia and systemic symptoms (severe skin reaction characterized by widespread skin rash, lymph node inflammation, and increased number of certain blood cells, such as eosinophils).

Frequency not known(cannot be estimated from the available data):

  • Agranulocytosis (decrease in a type of white blood cell, granulocytes), aplastic anemia (bone marrow failure to produce enough blood cells), hemolytic anemia (destruction of red blood cells), eosinophilia (increase in a type of white blood cell, eosinophils),
  • acidosis (increase in acid levels in the body), low blood glucose levels, nicotinic acid deficiency (vitamin B3 deficiency), anorexia,
  • hyperactivity, euphoria, insomnia, manic episodes, acute delirium, depression,
  • peripheral neuropathy (nerve damage outside the brain and spinal cord), optic neuritis (inflammation of the optic nerve), seizures,
  • visual disturbances, blurred vision,
  • breast enlargement in men,
  • deafness, tinnitus, vertigo,
  • vasculitis (inflammation of blood vessels),
  • liver failure (severe liver damage), acute liver disorders, liver damage, jaundice (yellowing of the skin and eyes),
  • constipation, dry mouth, nausea, vomiting, pancreatitis (inflammation of the pancreas), stomach pain (abdominal pain),
  • lung injuries that cause inflammation or scarring (interstitial lung disease),
  • acute skin reactions, Stevens-Johnson syndrome (severe skin reaction with blisters and peeling, especially around the mouth, nose, eyes, and genitals), acne, lymph node inflammation,
  • widespread skin rash, red and scaly, with bumps under the skin and blisters,

accompanied by fever. The symptoms usually appear at the start of treatment (acute generalized pustular exanthema),

Reporting of side effects

If you experience any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly through the Spanish Medicines and Healthcare Products Agency (AEMPS) website: http://www.aemps.gob.es.

5. Storage of Cemidon B6

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

Do not use this medicine after the expiry date which is stated on the carton after EXP. The expiry date refers to the last day of the month shown.

This medicine should be stored in a cool and dry place. Store protected from light at a temperature not exceeding 25°C.

Medicines should not be disposed of via wastewater or household waste. Place the empty packaging and any unused medicine in the pharmacy's SIGRE collection point. Ask your pharmacist how to dispose of the packaging and any unused medicine. This will help protect the environment.

6. Contents of the pack and other information

Composition of Cemidon B6

  • The active substances are isoniazid and pyridoxine.
  • The other components (excipients) are: gum arabic (E-414), hydroxyethyl methylcellulose, talc, magnesium stearate, tartrazine (E-102).

Appearance of the product and pack contents

Cemidon B6 150 mg/25 mg tablets are yellow, biconvex, and scored, with a diameter of approximately 8.2 mm.

Each pack contains 50 tablets in a PVC-PVDC-Aluminum blister pack.

Marketing authorization holder and manufacturer

Marketing authorization holder

CHIESI ESPAÑA, S.A.U.

Plaça d’Europa, 41-43, 10th floor

08908 L’Hospitalet de Llobregat

Barcelona (Spain)

Manufacturer

LABORATORIOS ALCALA FARMA S.L.

Avenida de Madrid, 82

28802 Alcalá de Henares

Madrid (Spain)

Date of the last revision of this leaflet:August 2025

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

Online doctors for CEMIDON B6 150 MG/25 MG TABLETS

Discuss questions about CEMIDON B6 150 MG/25 MG TABLETS, including use, safety considerations and prescription review, subject to medical assessment and local regulations.

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Doctor

Hocine Lokchiri

General medicine 21 years exp.

Dr. Hocine Lokchiri is a French consultant with over 20 years of experience in General and Emergency Medicine. He works with adults and children, helping patients with urgent symptoms, infections, sudden health changes and everyday medical concerns that require timely evaluation. His background includes clinical practice in France, Switzerland and the United Arab Emirates, which allows him to navigate different healthcare systems and manage a wide range of conditions with confidence. Patients value his calm, structured approach, clear explanations and evidence-based decision-making.

Online consultations with Dr. Lokchiri are suitable for many situations when someone needs quick medical guidance, reassurance or a clear next step. Common reasons for booking include:

  • fever, chills, fatigue and viral symptoms
  • cough, sore throat, nasal congestion, breathing discomfort
  • bronchitis and mild asthma flare-ups
  • nausea, diarrhoea, abdominal pain, digestive infections
  • rashes, allergic reactions, redness, insect bites
  • muscle or joint pain, mild injuries, sprains
  • headache, dizziness, migraine symptoms
  • stress-related symptoms, sleep disturbances
  • questions about test results and treatment plans
  • management of chronic conditions in stable phases
Many patients reach out when symptoms appear suddenly and cause concern, when a child becomes unwell unexpectedly, when a rash changes or spreads, or when it’s unclear whether an in-person examination is necessary. His emergency medicine background is particularly valuable online, helping patients understand risk levels, identify warning signs and choose safe next steps.

Some situations are not suitable for online care. If a patient has loss of consciousness, severe chest pain, uncontrolled bleeding, seizures, major trauma or symptoms suggesting a stroke or heart attack, he will advise seeking immediate local emergency services. This improves safety and ensures patients receive the right level of care.

Dr. Lokchiri’s professional training includes:

  • Advanced Trauma Life Support (ATLS)
  • Basic and Advanced Cardiac Life Support (BLS/ACLS)
  • Pediatric Advanced Life Support (PALS)
  • Prehospital Trauma Life Support (PHTLS)
  • eFAST and critical care transthoracic echocardiography
  • aviation medicine
He is an active member of several professional organisations, including the French Society of Emergency Medicine (SFMU), the French Association for Emergency Physicians (AMUF) and the Swiss Society of Emergency and Rescue Medicine (SGNOR). In consultations, he works with clarity and precision, helping patients understand their symptoms, possible risks and the safest treatment options.
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€58
5.0 (25)
Doctor

Lina Travkina

Family medicine 13 years exp.

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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€70
5.0 (760)
Doctor

Alina Tsurkan

Family medicine 13 years exp.

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, elevated cholesterol, weight management.
  • Neurological complaints: headaches, migraines, sleep disturbances, fatigue, general weakness.
  • 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.

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€55

Frequently Asked Questions

Is a prescription required for CEMIDON B6 150 MG/25 MG TABLETS?
CEMIDON B6 150 MG/25 MG TABLETS requires a prescription in Spain. You can check with a doctor online whether this medicine may be appropriate for your situation.
What is the active substance in CEMIDON B6 150 MG/25 MG TABLETS?
The active ingredient in CEMIDON B6 150 MG/25 MG TABLETS is isoniazid, combinations. This information helps identify medicines with the same composition but different brand names.
How much does CEMIDON B6 150 MG/25 MG TABLETS cost in pharmacies?
The average pharmacy price for CEMIDON B6 150 MG/25 MG TABLETS is around 3.64 EUR. Prices may vary depending on the manufacturer and dosage form.
Who manufactures CEMIDON B6 150 MG/25 MG TABLETS?
CEMIDON B6 150 MG/25 MG TABLETS is manufactured by Chiesi España S.A.U.. Pharmacy brands and packaging may differ depending on the distributor.
Which doctors can assess the use of CEMIDON B6 150 MG/25 MG TABLETS online?
Doctors such as Family doctors, Psychiatrists, Dermatologists, Cardiologists, Endocrinologists, Gastroenterologists, Pulmonologists, Nephrologists, Rheumatologists, Hematologists, Infectious disease physicians, Allergists, Geriatricians, Paediatricians, Oncologists may assess whether CEMIDON B6 150 MG/25 MG TABLETS is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.
What are the alternatives to CEMIDON B6 150 MG/25 MG TABLETS?
Other medicines with the same active substance (isoniazid, combinations) include CEMIDON B6 300 MG/50 MG TABLETS, CEMIDON B6 50 MG/15 MG TABLETS, CEMIDON 60 mg/ml INJECTABLE SOLUTION. These may have different brand names or formulations but contain the same therapeutic ingredient. Always consult a doctor before switching or starting a new medicine.
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