Zantac Tablets provide effective, enduring relief from indigestion and heartburn. Zantac works by countering production of acid in the stomach. One Zantac tablet gets to work fast, soothing and calming the stomach, and goes on working for up to 12 hours.
Dosage: Adults and children aged 16 years and over: Swallow one whole zantac tablet with a dirnk of water, as soon as you have symptoms. If symptoms persist for more than 1 hour another tablet can be taken. For prevention of symptoms associated with drinking and eating, take one tablet 30-60 minutes beforehand. Do not take more than 4 tablets in 24 hours.
How does Zantac work?
Zantac 75 tablets contain the active ingredient ranitidine, which is a type of medicine called an H2 receptor antagonist. Ranitidine acts in the stomach to decrease the production of stomach acid.
Zantac (Ranitidine) works by blocking histamine H2 receptors that are found on the cells in the stomach lining. A natural body chemical called histamine normally binds to these receptors, causing the cells to produce stomach acid. By blocking the H2 receptors, ranitidine prevents histamine from binding to them. This stops the cells from producing stomach acid.
Stomach acid is produced as a normal part of the digestive process. If large amounts of stomach acid are produced this can cause the pain and discomfort in the abdomen commonly known as indigestion. The excess acid may also flow back into the food pipe (oesophagus) causing pain and a burning sensation known as heartburn.
By reducing the production of stomach acid, ranitidine helps relieve the symptoms of heartburn and indigestion.
One Zantac 75 tablet should be swallowed whole with a glass of water as soon as you have symptoms. If symptoms persist for more than one hour or return, take another tablet. Do not take more than four tablets in 24 hours.
To prevent indigestion, hyperacidity and heartburn associated with consuming food and drink, swallow one Zantac 75 tablet with water half to one hour before eating or drinking.
What is Zantac used for?
- Relieving symptoms of excess acid in the stomach (hyperacidity), heartburn and indigestion.
- Preventing heartburn, indigestion and hyperacidity associated with consuming food and drink.
- Indigestion and heartburn can sometimes be symptoms of more serious conditions such as stomach ulsers or stomach cancer. For this reason, you should consult your doctor before taking this medicine if any of the following apply to you: you are middle aged or older and your indigestion symptoms are new or recently changed; you have difficulty swallowing; you have persistant stomach pain or unintended weight loss associated with indigestion; or you are taking a non-steroidal anti-inflammatory drug (NSAID), eg aspirin, ibuprofen, diclofenac, indometacin, naproxen, azapropazone, piroxicam, ketoprofen.
- Do not exceed the recommended dose of this medicine.
- Do not use this medicine for longer than two weeks without first consulting your doctor.
- If your symptoms persist or get worse despite taking this medicine you should consult your doctor.
Use with caution in
- Decreased kidney function (consult your doctor before taking this medicine).
Not to be used in
- History of blood disorders called porphyrias.
- Children under 16 years of age (ranitidine should not be used in children unless prescribed by a doctor).
Zantac should not be used if you are allergic to one or any of its ingredients. Please inform your doctor or pharmacist if you have previously experienced such an allergy. If you feel you have experienced an allergic reaction, stop using this medicine and inform your doctor or pharmacist immediately.
Pregnancy and breastfeeding
Certain medicines should not be used during pregnancy or breastfeeding. However, other medicines may be safely used in pregnancy or breastfeeding providing the benefits to the mother outweigh the risks to the unborn baby. Always inform your doctor if you are pregnant or planning a pregnancy, before using any medicine.
- This medicine is not known to be harmful when used during pregnancy. However, as with all medicines, it is not recommended for use during pregnancy unless considered essential by your doctor. If you are pregnant you must seek medical advice from your doctor before taking this medicine.
- This medicine passes into breast milk. The effect on a nursing infant is not known, although it does not appear to be harmful. The manufacturer recommends that this medicine should not be used during breastfeeding unless considered essential by your doctor. Seek medical advice from your doctor if you are breastfeeding.
Medicines and their possible side effects can affect individual people in different ways. The following are some of the side effects that are known to be associated with this medicine. Just because a side effect is stated here does not mean that all people using this medicine will experience that or any side effect.
Rare (affect between 1 in 1000 and 1 in 10,000 people)
- Allergic reaction.
- Skin rash.
- Alteration in results of liver function tests.
Very rare (affect fewer than 1 in 10,000 people)
- Blurred vision.
- Slow heart rate (bradycardia).
- Inflammation of the liver (hepatitis).
- Inflammation of the pancreas (pancreatitis).
- Inflammation of the kidney (acute interstitial nephritis).
- Reversible impotence.
- Hair loss (alopecia).
- Pain in the muscles or joints.
- False perceptions of things that are not really there (hallucinations).
- Decrease in the normal number of blood cells in the blood.
The side effects listed above may not include all of the side effects reported by the medicine's manufacturer. For more information about any other possible risks associated with this medicine, please read the information provided with the medicine or consult your doctor or pharmacist.
How can Zantac affect other medicines?
If you are already taking any other medicines you should check with your pharmacist before taking ranitidine as well, to make sure the combination is safe.
As ranitidine lowers the acidity in the gut it may reduce the absorption of the following medicines, which could make them less effective:
Ask your pharmacist for advice if you are taking any of these.
If you are taking a non-steroidal anti-inflammatory drug (NSAID, eg aspirin, ibuprofen, diclofenac, indometacin, naproxen, azapropazone, piroxicam, ketoprofen etc), you should consult your doctor before taking this medicine. This is because the NSAID medicine could be the cause of your symptoms. While ranitidine may improve the symptoms, it may also be masking an underlying problem.