Frequently Asked Questions

frequently asked questions

What is heartburn?

Heartburn is that uncomfortable burning feeling or pain that rises up from your chest and is linked to stomach acid leaking up into your oesophagus (the tube that connects your throat and stomach).

What is indigestion?

Indigestion refers to a range of troublesome symptoms which can include pain or discomfort in your upper tummy (dyspepsia) or a burning pain raising up from your chest (heartburn).

Other symptoms commonly associated with indigestion include feeling full or bloated after eating, feeling sick (nausea), belching or bringing up (regurgitating) food.

What is acid reflux?

Acid reflux occurs when the acid in your stomach leaks (refluxes) up into your oesophagus (the tube that connects your throat and stomach).

The refluxed acid can irritate the sensitive lining of the oesophagus causing pain and inflammation (oesophagitis). Heartburn is the main symptom of both acid reflux and oesophagitis.

What is GORD?

Gastro‐oesophageal reflux disease (GORD) is the chronic, more severe form of acid reflux.

When does heartburn become chronic or severe?

Nearly everyone gets heartburn at some time or other – it is a very common problem. Usually the symptoms are only mild and soon go away with lifestyle changes or over‐the‐counter medications such as Zantac.

If your heartburn occurs regularly, for example, a few times a week or even every day, it may need further investigation and treatment. Similarly, if lifestyle changes and over‐the‐counter treatments are not working (or you think you are relying on them too much), other treatments may be needed, and you should see your doctor.

Long‐term (chronic) heartburn may be a symptom of gastro‐oesophageal reflux disease (GORD).

What does heartburn feel like?

Heartburn is the uncomfortable burning feeling or pain that starts in your chest and can move up in to your neck and throat. Heartburn usually occurs after you have eaten something and gets worse if you then lay down or bend over.

What is the active ingredient in Zantac tablets?

The active ingredient in Zantac is ranitidine hydrochloride which belongs to a group of medicines called H2‐antagonists.

Ranitidine hydrochloride is an acid‐suppressing medicine. It works by reducing the volume of acid the stomach produces to provide long‐lasting relief from heartburn.

How long does Zantac take to work?

A single Zantac tablet starts working in as little as 30 minutes and can provide effective relief from heartburn and acid reflux for up to 24 hours.*

*Zantac tables are available in either 12 or 24‐hour formulas.

Does Zantac contain gluten or lactose?

Zantac tablets are free from both gluten and lactose.

Is Zantac an antacid?

No, Zantac is not an antacid ‐ Zantac is an acid‐suppressing medicine.

Antacids are alkaline medications that neutralise the acid in your stomach making it less acidic. Acid‐suppressing medicines, such as Zantac, work by reducing (supressing) the amount of acid the stomach makes.

Can I take Zantac with food?

It does not matter whether you take Zantac before or after food. Zantac tablets should be swallowed whole (do not chew) with water as soon as you have symptoms, at any time of the day or night.

Please read the pack for full directions for use.

Is Zantac recommended for children?

Zantac is only recommended for adults and children over 12 years. Do not use Zantac if your child is under 12 years of age unless directed to do so by your doctor.

Please read the pack for full directions for use.

Does Zantac have any side‐effects?

Like other medicines, Zantac may cause some side‐effects. Most of the side‐effects will be minor and temporary. If you notice any symptoms that concern you or if the tablets cause any side‐ effects, stop taking them and tell your doctor or pharmacist.

Is Zantac available in syrup form?

Yes, Zantac is available in syrup form, but only if you have a prescription from your doctor.

Can I take Zantac if I am pregnant?

Indigestions and heartburn can be an annoyingly common problems during pregnancy. The good news is it usually disappears after birth.

Tell your doctor if you are pregnant, likely to get pregnant or are breast feeding. Your doctor will be able to tell you if you can take Zantac. You should always talk to your doctor or pharmacist before taking any medicine during pregnancy.

What dosages does Zantac come in?

Zantac easy to swallow tablets come in two strengths:

  • Zantac 150 mg ranitidine (as hydrochloride) for 12‐hour active relief from heartburn and acid indigestion due to gastro‐oesophageal reflux
    • Available in 7 and 14 tablet packs in grocery stores
    • Available in 14 and 28 tablet packs from your
  • Zantac Double Strength 300 mg ranitidine (as hydrochloride) for long‐lasting 24‐hour relief from heartburn and acid indigestion due to gastro‐oesophageal reflux with one
    • Available in 7 tablet packs in grocery stores
    • Available in 14 tablet packs form your

What is the difference between Zantac Double Strength and the Zantac original dosage?

Zantac Double Strength (300 mg ranitidine) is designed for the convenience of people who routinely need to take two Zantac original (150 mg ranitidine) tablets to relieve their heartburn symptoms.

What dosage should I take?

The dosage needed to relieve heartburn symptoms may vary from person to person. The normal adult Zantac dosage is 150 to 300 mg of ranitidine per day, taken as one 150 mg Zantac tablet once or twice a day as needed.

If you find you routinely need to take two 150 mg tablets to relieve your symptoms you can, instead, take one 300 mg Zantac Double Strength tablet.

  • Original Zantac (150 mg ranitidine) the maximum recommended dose is 2 tablets in 24 hours
  • Zantac Double Strength (300 mg ranitidine) the maximum recommended dose is 1 tablet in 24

Please read the pack for full directions for use. It is not recommended that you use Zantac for more than 14 days continuously.

Is Zantac the same as Gaviscon®?

Gaviscon products are not the same as Zantac. Gaviscon contains an alginate that works by forming a barrier over the top of the stomach contents. Gaviscon products also contain an antacid that help to neutralise stomach acid.

Zantac is an acid‐suppressing medicine and works by reducing (supressing) the amount of acid the stomach makes.

Is Zantac the same as Mylanta® Original?

Mylanta Original is not the same as Zantac. It is an antacid that works by neutralising stomach acid. The active ingredients in Mylanta Original are aluminium hydroxide, magnesium hydroxide and simethicone.

Zantac contains ranitidine hydrochloride, an acid‐suppressing medicine that works by reducing (supressing) the amount of acid the stomach makes.

Is Zantac the same as Nexium®24hr?

Zantac and Nexium24hr are both acid‐suppressing medicines – but act in different ways to supress the amount of acid the stomach makes.

The active ingredient in Nexium24hr is esomeprazole magnesium trihydrate, a type of medicine called a proton‐pump inhibitor (PPI), whereas the active ingredient in Zantac is ranitidine hydrochloride, a H2‐antagonist.

What can I do to avoid heartburn?

Making a few simple changes to your diet and lifestyle may help prevent or make heartburn easier to manage.

These can include:

  • Eating smaller more frequent meals and avoiding foods you know may trigger your heartburn g., fatty or spicy foods, coffee and alcohol
  • Stop smoking
  • If you are overweight – try losing some weight
  • Don’t lay down after just eating a meal – wait awhile
  • Avoid wearing tight

Over‐the‐counter medicines, such as Zantac, can also help provide relief from heartburn symptoms.

Should I seek help from a GP if my heartburn keeps coming back?

Most people do not need to seek medical advice for their heartburn. If your heartburn occurs regularly, for example, a few days a week or even every day, it may need further investigation and treatment. If changes to your diet and lifestyle or over‐the‐counter medicines are not working (or you think you are relying on them too much), other treatments maybe needed, and you should see your doctor.

Talk to you doctor if you have any of the following:

  • You have heartburn several times a week or for prolonged periods of time
  • Your heartburn symptoms are severe
  • Lifestyle and over‐the‐counter medications are not helping
  • You have problems swallowing (dysphagia)
  • Persistent vomiting
  • Unexplained weight loss
  • You have blood in your vomit or stools

If you have chest pain and are in any doubt as to whether it is heartburn or a heart attack – seek immediate medical help.

What can I do to avoid heartburn?

Making a few simple changes to your diet and lifestyle may help prevent or make heartburn easier to manage.

These can include:

  • Eating smaller more frequent meals and avoiding foods you know may trigger your heartburn g., fatty or spicy foods, coffee and alcohol
  • Stop smoking
  • If you are overweight – try losing some weight
  • Don’t lay down after just eating a meal – wait awhile
  • Avoid wearing tight

Over‐the‐counter medicines, such as Zantac, can also help provide relief from heartburn symptoms.