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Rennie 680 mg/80 mg comprimidos masticables with saccharin

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Doctor
5.0(11)

Anna Biriukova

Gastroenterology6 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.
Book a video appointment
€66
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 RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN

Contents of the leaflet

  1. Introduction
  2. What Rennie is and what it is used for
  3. What you need to know before taking Rennie
  4. How to take Rennie
  5. Possible side effects
  6. Storage of Rennie
  7. Package contents and additional information

Introduction

PATIENT INFORMATION LEAFLET

Rennie 680 mg/80 mg chewable tablets with saccharin

Calcium carbonate/Magnesium carbonate

Read this leaflet carefully before starting to take this medicine because it contains important information for you.

Follow exactly the administration instructions of the medicine contained in this leaflet or as indicated by your doctor, pharmacist, or nurse.

  • Keep this leaflet, as you may need to read it again.
  • If you need advice or more information, consult your pharmacist.
  • If you experience side effects, consult your doctor, pharmacist, or nurse, even if they are side effects not listed in this leaflet. See section 4.
  • You should consult a doctor if it worsens or does not improve after 7 days.

Contents of the leaflet:

  1. What Rennie is and what it is used for.
  2. What you need to know before taking Rennie
  3. How to take Rennie
  4. Possible side effects.
  5. Storage of Rennie.
  6. Package contents and additional information.

1. What Rennie is and what it is used for

Rennie belongs to the group of medicines called aluminum, calcium, and magnesium combinations and complexes.

It contains calcium carbonate and magnesium carbonate as active ingredients, which act by neutralizing excess stomach acid

Rennie is indicated for the relief and symptomatic treatment of heartburn and stomach acid in adults and adolescents over 12 years old.

You should consult a doctor if it worsens or does not improve after 7 days.

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 taking Rennie

Do not take Rennie:

  • If you are allergic to any of the active ingredients or to any of the other components of this medicine (listed in section 6).
  • If you have severe kidney failure, hypercalcemia (high blood calcium levels), and hypophosphatemia (low phosphate levels in the blood).
  • If you have a history of kidney stones made of calcium.
  • If you have hypercalciuria (high levels of calcium in the urine)

Warnings and Precautions

Consult your doctor, pharmacist, or nurse before starting to take Rennie

  • Avoid prolonged use.
  • Do not exceed the recommended dose (see section 3)
  • Consult your doctor or pharmacist before taking Rennie if you have kidney problems, as the administration of this medicine in subjects with altered renal function can cause hypercalcemia (elevated blood calcium levels) and metabolic alkalosis (milk-alkali syndrome).
  • If the symptoms worsen or persist for more than 7 days, you should consult a doctor.
  • The medicine should not be taken with large amounts of milk or dairy products.

Children and adolescents

Do not administer to children under 12 years old without consulting a doctor.

Taking Rennie with other medicines

Tell your doctor or pharmacist if you are taking, have recently taken, or might take any other medicine.

Before taking Rennie, inform your doctor or pharmacist if you are taking any of the following medicines, as they may affect the efficacy of these medicines:

  • calcitonin,
  • sodium phosphate and other phosphates,
  • oral contraceptives,
  • thiazide diuretics (medicines used to increase urine excretion rate),
  • fluorides (medicines for the prevention of tooth decay),
  • amphetamines or quinidine,
  • salicylates (medicines with anti-inflammatory, analgesic, and antipyretic properties),
  • vitamin D,
  • heart medicines such as glycosides (digoxin, bisphosphonates, or dolutegravir),
  • levothyroxine (a thyroid hormone),
  • eltrombopag (a medicine used to increase platelet count),
  • other medicines prescribed by a doctor (e.g., etidronate, iron-containing products, anticholinergics, antimuscarinics, phenothiazines, benzodiazepines, ketoconazole, diflunisal, H2 antihistamines, sucralfate, oral anticoagulants derived from coumarin or indandione, antibiotics such as tetracyclines or quinolones), as they may interfere with its absorption.

It is recommended to space the administration of antacids and other medicines by 1 or 2 hours.

Interference with laboratory tests

If you are going to undergo any laboratory tests (including blood tests, urine tests, skin tests using allergens, etc.), inform your doctor that you are taking this medicine, as it may alter the results.

Taking Rennie with food and drinks

Like all antacids that contain calcium, it should not be taken with large amounts of milk or dairy products, as it may cause increased calcium or magnesium levels in the blood and milk-alkali syndrome.

Pregnancy, breastfeeding, and fertility

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

Rennie chewable tablets with saccharin may be used during pregnancy and breastfeeding if taken according to these recommendations and not taken for more than 2 weeks.

Pregnant or breastfeeding women should not take more than the recommended amount of medicine (see section 3, How to take Rennie) and should not take large amounts of dairy products and milk at the same time (1 liter of milk contains 1.2 grams of elemental calcium), as this medicine provides a significant amount of calcium in addition to their daily intake.

There is no evidence to suggest that Rennie has adverse effects on human fertility.

Driving and using machines

No effects on the ability to drive and use machines have been reported.

Rennie chewable tablets with saccharin contain isomaltose

This medicine contains 500 mg of isomaltose in each tablet.

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

3. How to take Rennie

Follow exactly the administration instructions of the medicine contained in this leaflet or as indicated by your doctor, pharmacist, or nurse. In case of doubt, ask your doctor, pharmacist, or nurse.

Posology

The recommended dose is:

Adults and adolescents over 12 years old: 1 or 2 tablets, preferably 1 hour after meals and before bedtime. Additionally, if necessary, an extra dose can be taken. Do not take more than 6 tablets in 24 hours. Do not take for more than 2 weeks.

Method of administration

Oral route

Remove the tablets from the packaging. Rennie tablets should be chewed or allowed to dissolve slowly in the mouth. They should not be swallowed whole.

Use in children and adolescents

Do not administer to children under 12 years old.

If symptoms persist after 7 days of treatment, consult your doctor to rule out more serious diseases.

If you take more Rennie than you should:

Symptoms of overdose include nausea, vomiting, constipation, fatigue, difficulty and pain when urinating, and kidney stones. In these cases, stop treatment, drink plenty of water, and consult your doctor or pharmacist.

In case of overdose or accidental ingestion, consult your doctor or pharmacist or go to a medical center or call the Toxicology Information Service, phone: 91 562.04.20, indicating the medicine and the amount ingested.

It is recommended to take the packaging and leaflet of the medicine to the healthcare professional.

If you forget to take Rennie

If you forget to take a dose, wait for the next one. Do not take a double dose to make up for forgotten doses.

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

Medicine questions

Started taking the medicine and have questions?

Discuss your symptoms and treatment with a doctor online.

4. Possible side effects

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

When used normally, at the recommended doses, it is not expected to cause side effects.

The adverse reactions mentioned below are based on spontaneous notifications and their frequency has not been established with precision:

Immune system disorders

Very rarely, allergic reactions such as skin rashes, itching, difficulty breathing, and swelling of the face, mouth, or throat, and anaphylaxis have been reported. If you experience these reactions, stop taking this medicine and consult your doctor immediately.

Metabolism and nutrition disorders:

Prolonged use of high doses may cause hypermagnesemia (elevated magnesium levels in the blood) or hypercalcemia (elevated calcium levels in the blood) and milk-alkali syndrome, especially in patients with kidney function disorders.

Gastrointestinal disorders:

Prolonged use of high doses may lead to nausea, vomiting, stomach discomfort, constipation, and diarrhea, especially in patients with altered renal function.

In some cases, constipation has occurred. Flatulence (gas), belching, and stomach bloating may also occur.

Musculoskeletal and connective tissue disorders:

Muscle fatigue, especially in patients with altered renal function.

The specific symptoms of milk-alkali syndrome may include taste disorders, headache, kidney problems, fatigue, and lumps under the skin.

If you observe these or any other adverse reactions not described above, consult your doctor or pharmacist.

Reporting of side effects:

If you experience any type of side effect, consult your doctor, pharmacist, or nurse, even if it is a possible side effect not listed in this leaflet. You can also report them directly through the Spanish Medicines and Healthcare Products Agency (AEMPS) website: http://www.notificaram.es. By reporting side effects, you can help provide more information on the safety of this medicine.

5. Storage of Rennie

Keep this medicine out of the sight and reach of children

Do not use Rennie after the expiration date stated on the packaging, after the abbreviation EXP. The expiration date is the last day of the month indicated.

No special storage conditions are required.

Medicines should not be disposed of via wastewater or household waste. Deposit the packaging and medicines you no longer need at the pharmacy's SIGRE point. If in doubt, ask your pharmacist how to dispose of the packaging and medicines you no longer need. This will help protect the environment.

6. Package contents and additional information

Composition of Rennie chewable tablets with saccharin:

  • The active ingredients are: calcium carbonate 680 mg and magnesium carbonate 80 mg.
  • The other ingredients (excipients) are: isomaltose (E-953), talc, magnesium stearate, peppermint flavor, saccharin.

Appearance of the product and package contents

Rennie is white-cream colored, square-shaped tablets with a peppermint odor.

Rennie is available in packages containing 36 or 48 chewable tablets each. It is presented in aluminum/PVC blisters.

Not all package sizes may be marketed.

Marketing authorization holder and manufacturer

Marketing authorization holder

BAYER HISPANIA, S.L.

Av. Baix Llobregat, 3-5

08970 Sant Joan Despí (Barcelona)

Spain

Manufacturer

Bayer Bitterfeld GmbH

OT Greppin

Salegaster Chaussee 1

06803 Bitterfeld-Wolfen

Germany

Date of the last revision of this leaflet:December 2024

Detailed and updated 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 RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN

Discuss questions about RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN, including use, safety considerations and prescription review, subject to medical assessment and local regulations.

Doctor
5.0(11)

Anna Biriukova

Gastroenterology6 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.
Book a video appointment
€66
Doctor
5.0(38)

Andrei Popov

General medicinePain medicine7 years of experience

Dr. Andrei Popov is a General Practitioner with specialized training in chronic pain. He provides online consultations for adult patients in Spain and other European countries.

Dr. Popov understands that seeking help with weight-related concerns or pain that has persisted for months can be difficult. Many patients come to him after trying different approaches without feeling truly heard. During the consultation, the doctor creates a comfortable and supportive, non-judgmental environment where the patient’s medical history can be discussed in detail, questions can be answered, and the next steps can be decided together.

Weight Management and Metabolic Health

Dr. Popov can help assess overweight, obesity, and related conditions such as hypertension, diabetes, or metabolic disorders. During the consultation, the patient’s medical history, test results, current medications, and previous treatments will be reviewed.

If you would like to learn about possible medication options or have already started treatment, the doctor can assess your situation, review the effectiveness and tolerability of the therapy, and clearly explain its benefits, potential risks, and alternatives.

Not every patient requires the same treatment. A consultation does not guarantee a prescription — it provides an objective medical assessment and a plan tailored to your individual situation.

Pain and General Medicine

You can also consult Dr. Popov regarding:

* chronic pain, migraines, neuralgia, and fibromyalgia;

* back, neck, lower back, or joint pain;

* hypertension, diabetes, and follow-up of chronic conditions;

* review of test results, medical reports, and current treatment;

* preventive medicine and a second medical opinion.

How the Consultation Works

The video consultation lasts up to 30 minutes. The doctor will listen carefully, review the information you provide, and explain the next steps in clear and understandable language.

If additional tests, an in-person consultation, or urgent medical care are required, the doctor will inform you directly.

Dr. Popov’s goal is to make sure the patient feels heard and leaves the consultation with a clear understanding of their condition and the next steps they can take.

Book a video appointment
€86
Doctor
5.0(12)

Yevgen Yakovenko

General medicine12 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.
  • Obesity treatment and weight management: a medical approach to weight loss, including assessment of underlying causes, evaluation of comorbidities, development of a personalised plan (nutrition, physical activity, pharmacotherapy if needed), and ongoing progress monitoring.
  • 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.

Book a video appointment
€72
Doctor
5.0(3)

Lina Travkina

General medicine13 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.

Book a video appointment
€75
Doctor
5.0(21)

Nuno Tavares Lopes

General medicine18 years of experience

Dr. Nuno Tavares Lopes is a licensed physician in Portugal with 17 years of experience in emergency medicine, family and general practice, and public health. He is the Director of Medical and Public Health Services at an international healthcare network and serves as an external consultant for the WHO and ECDC.

  • Emergency care: infections, fever, chest/abdominal pain, minor injuries, paediatric emergencies

  • Family medicine: hypertension, diabetes, cholesterol, chronic disease management

  • Travel medicine: pre-travel advice, vaccinations, fit-to-fly certificates, travel-related illnesses

  • Sexual and reproductive health: PrEP, STD prevention, counselling, treatment

  • Weight management and wellness: personalised weight loss programmes, lifestyle guidance

  • Skin and ENT issues: acne, eczema, allergies, rashes, sore throat, sinusitis

  • Pain management: acute and chronic pain, post-surgical care

  • Public health: prevention, health screenings, long-term monitoring

  • Sick leave (Baixa médica) connected to Segurança Social in Portugal

  • IMT medical certificates for driving licence exchange

Dr. Nuno Tavares Lopes provides medical support for patients using GLP-1 medications (Mounjaro, Wegovy, Ozempic, Rybelsus) as part of a weight loss strategy. He offers individualised treatment planning, regular follow-up, dose adjustment, and advice on combining medication with sustainable lifestyle changes. Consultations follow the medical standards accepted in Europe.Dr. Lopes also provides interpretation of medical tests, follow-up care for complex patients, and multilingual support. Whether for urgent concerns or long-term care, he helps patients act with clarity and confidence.

Book a video appointment
€70

Frequently Asked Questions

RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN does not require a prescription in Spain. You can check with a doctor online whether this medicine may be appropriate for your situation.

The active ingredient in RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN is ordinary salt combinations. This information helps identify medicines with the same composition but different brand names.

RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN is manufactured by Bayer Hispania S.L.. Pharmacy brands and packaging may differ depending on the distributor.

Doctors such as Family doctors, Psychiatrists, Dermatologists, Cardiologists, Endocrinologists, Gastroenterologists, Pulmonologists, Nephrologists, Rheumatologists, Hematologists, Infectious disease physicians, Allergists, Geriatricians, Paediatricians, Oncologists may assess whether RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN is appropriate, depending on your situation and local regulations. You can book an online consultation to discuss your symptoms and possible next steps.

The prescription is issued by a doctor after assessing your health. In Spain, RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SACCHARIN is then dispensed in pharmacies with that prescription. An online consultation does not guarantee that a prescription will be issued: the decision always rests with the doctor.

To request a review, you can use Oladoctor:

Other medicines with the same active substance (ordinary salt combinations) include ACYLINE 620 mg/380 mg/630 mg ORAL SUSPENSION, RENNIE 680 MG/80 MG CHEWABLE TABLETS WITH SUCROSE, ALMAGATO STADAPHARM 1.5 G ORAL SUSPENSION. 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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