Rennie Tablet Uses, Dosage, Side Effects, Precautions & Warnings

RENNIE, tablet, box of 48
82 / 100

Therapeutic Class: Gastro-Entero-Hepatology
active ingredients: calcium carbonate , magnesium carbonate (E504)

what is rennie tablet medication used for and indication?

This medication is indicated in adults (from 15 years of age) in heartburn and acid reflux.


14 presentations are available for this drug:

  • 2 aluminum foil envelope of 12 tablet (s)
  • 3 aluminum foil envelopes of 12 tablet (s)
  • 4 aluminum foil envelope of 12 tablet (s)
  • 5 aluminum foil envelope of 12 tablet (s)
  • 6 aluminum foil envelopes of 12 tablet (s)
  • 7 aluminum foil envelope of 12 tablet (s)
  • 8 aluminum foil envelope of 12 tablet (s)
  • aluminum foil envelope of 12 tablet (s)
  • PVC-aluminum blister pack (s) of 25 tablet (s)
  • PVC-aluminum blister pack (s) of 36 tablet (s)
  • PVC-aluminum blister pack (s) of 48 tablet (s)
  • PVC-aluminum blister pack (s) of 50 tablet (s)
  • PVC-aluminum blister pack (s) of 60 tablet (s)
  • PVC-aluminum blister pack (s) of 96 tablet (s)
Pharmaceutical class not communicated
Active substance (s) for one tablet: calcium carbonate (680 mg), heavy magnesium (carbonate) (80 mg)
General medicine no
Pharmaceutical form compressed
Route (s) of administration oral
Selling price unregulated price
Social security reimbursement rate 0%
Laboratory (s) Laboratory (ies) manufacturer Rennie
Conditions of issue available without prescription

rennie tablet Dosage

RESERVED FOR ADULTS (from 15 years old).

  • 1 to 2 tablets at the time of heartburn or acid reflux, or 4 to 8 tablets per day.
  • In case of more intense pain, the dosage may be increased, for a short period, to 12 tablets per day.
  • The duration of treatment will be limited to 10 days.

rennie tablet Contraindications

Never take RENNIE, tablet in case of:

  • a history of allergy to one of the components of the tablet,
  • severe kidney disease,
  • hypercalcemia (abnormally high level of calcium in the blood).


How To Take rennie tablet ?

Administration mode

  • Oral route.
  • Suck or chew on the tablet (s).

Frequency of administration

  • Take 1 to 2 tablets at the time of pain. Observe the maximum dosage.

Duration of treatment

  • The duration of use is limited to 10 days.

how does rennie tablet work?

Pharmacotherapeutic group: ANTIACIDS, ATC code: A02A.

  • Association of two antacids (calcium carbonate and magnesium carbonate).
  • This medicine has a local action, and does not depend on blood absorption.
  • Calcium carbonate has a neutralizing effect. This effect is potentiated by the addition of magnesium carbonate which also exhibits a neutralizing effect.

How To Store rennie tablet ?

  • Keep this medication out of the sight and reach of children.
  • Do not use this medicine after the expiry date which is stated on the package. The expiration date refers to the last day of that month.
  • No special storage conditions.
  • Do not throw away any medicines via a wastewater treatment plant or with household waste. Ask your pharmacist how to throw away the medicines you no longer use. These measures will help protect the environment.

rennie tablet Side Effects

Like all medicines, RENNIE, tablet can cause side effects, although not everybody gets them:

  • Possibility of digestive disorders (diarrhea).
  • In high and prolonged doses, possible occurrence of hypercalcemia (abnormally high level of calcium in the blood), kidney stones and severe kidney problems.

If you notice any side effects not listed in this leaflet, or if any side effects get serious, please tell your doctor or pharmacist.

Keep out of the reach and sight of children.

rennie tablet Interactions

Combinations subject to precautions for use

There is a decrease in the digestive absorption of drugs administered simultaneously.

As a precaution, antacids should be taken away from other drugs.

Take this medication more than 2 hours apart , if possible, with:

  • · Acetylsalicylic acid,
  • · Antisecretory H2 antihistamines,
  • · Atenolol,
  • · Bisphosphonates,
  • · Sulphosodium catioresin: reduction of the resin’s capacity to fix potassium, with the risk of metabolic alkalosis in renal failure.
  • · Chloroquine,
  • · Cyclins,
  • · Digitalis,
  • · Estramustine,
  • · Ethambutol,
  • · Iron
  • · Fexofenadine,
  • · Fluor
  • · Fluoroquinolones,
  • · Glucocorticoids (except hydrocortisone in replacement therapy): described for prednisolone and dexamethasone.
  • · Thyroid Hormones,
  • · Indomethacin,
  • · Isoniazid,
  • · Lansoprazole,
  • · Lincosanides,
  • – Metoprolol, propranolol,
  • · Neuroleptic phenothiazines,
  • · Penicilllamine,
  • · Phosphorus,
  • · Strontium
  • · Sulpiride,
  • · Zinc.

Associations to take into account

  • · Thiazide and related diuretics: risk of hypercalcemia due to decreased calcium excretion in urine

Effects on ability to Drive and use machines

  • Not applicable.
  • Not applicable.
  • Not applicable.
  • Not applicable.

Warnings and Precautions


  • You should only use this medicine after advice from your doctor:
    • if your problems are associated with weight loss,
    • if you have difficulty swallowing or persistent abdominal discomfort,
    • if you are having trouble with your digestion for the first time or if these problems have changed recently,
    • if you have kidney disease.
  • Due to the presence of sucrose, this medication should not be used in patients with fructose intolerance, glucose-galactose malabsorption syndrome or sucrase-isomaltase deficiency (rare metabolic diseases).


Precautions for use

Use this medication only with caution

  • If the intensity and / or frequency of symptoms persist without improvement or worsen after 10 days of treatment, do not increase the dose but take the advice of your doctor or pharmacist.
  • If you are led to exceed 4 to 8 tablets per day, this treatment should be of short duration. It should not be continued after the symptoms disappear. You should not exceed 12 tablets per day.
  • This medication contains 475 mg of sucrose per tablet: take it into account in the daily ration in the event of a low-sugar diet or diabetes.




  • In animals, there are no reliable data on teratogenesis. Ossification abnormalities have been described at high doses and with prolonged administration of calcium carbonate.
  • Clinically, no particular malformative or foetotoxic effect has appeared to date at the recommended dosages. However, the follow-up of pregnancies exposed to this association is insufficient to exclude any risk.
  • Therefore, the use of this medicine should only be considered during pregnancy if necessary .
  • Take into account the presence of:
    • · Magnesium salts that can cause diarrhea,
    • · Calcium salts, which in high and prolonged doses, expose to the risk of hypercalcemia with calcinosis of various organs, especially the kidneys.

Feeding with milk

  • Breast-feeding is possible under the normal conditions of using this medication.


Not applicable.

What happens if I overdose from rennie tablet ?

If you take more RENNIE, tablet than you should

  • In case of overdose, transit disorders may appear (diarrhea), in this case, it is recommended to interrupt the treatment and consult a doctor.

What should I do if I miss a dose?

If you forget to take RENNIE, tablet

  • Do not take a double dose to make up for the single dose you forgot to take.

What happens if you stop taking rennie tablet ?

If you stop taking RENNIE, tablet

  • Not applicable.
  • Not applicable.
  • Not applicable.
  • Not applicable.

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

What is  Forms and Composition ?

Appearance and shape


  • Tablets in blister packs (PVC / Aluminum); box of 25, 36, 48, 50, 60, 72 or 96 tablets.
  • 12 tablets wrapped in foil (paper / Aluminum).
  • 12 tablets wrapped in foil (paper / Aluminum), packaging of 2 X 12 tablets, 3 X 12 tablets, 4 X 12 tablets, 5 X 12 tablets, 6 X 12 tablets, 7 X 12 tablets or 8 X 12 tablets.
  • Not all presentations may be marketed.

Other shapes

  • RENNIE, tablet, box of 96
  • RENNIECHEW, chewable tablet, heat-sealed complex chewable tablets of 30


Active ingredient Compressed
Calcium carbonate 680 mg *
Magnesium carbonate 80 mg *

* per unit dose

  • Active ingredients: calcium carbonate , magnesium carbonate
  • Excipients: Potato starch , Gelable corn starch , Magnesium stearate , Talc , Light liquid paraffin , Mint flavor , lemon flavor , Sucrose

No excipient with known effect 

  • is not present in the composition of this drug


Edrug-online contains comprehensive and detailed information about drugs available in the medical field, and is divided into four sections:

general information:

  • Includes a general description of the drug, its use, brand names, FAQs, and relevant news and articles

Additional information:

  • General explanation about dealing with the medicine: how to take the medicine, the doses and times of it, the start and duration of its effectiveness, the recommended diet during the period of taking the medicine, the method of storage and storage, recommendations in cases for forgetting the dose and instructions to stop taking the drug and take additional doses.

Special warnings:

  • For pregnant and breastfeeding women, the elderly, boys and drivers, and use before surgery.

Side effects:

  • It treats possible side effects and drug interactions that require attention and its effect on continuous use.
  • The information contained in this medicine is based on medical literature, but it is not a substitute for consulting a doctor.

Leave A Reply