Pregnancy & Heartburn

The most common symptoms of heartburn in pregnancy are:

  • Pain behind the ribs and a rumbling and gurgling stomach
  • A knotted stomach and feeling bloated and uncomfortable after eating
  • Suffering from stomach cramps and excessive burping and flatulence
  • A burning sensation in your chest or throat after eating
  • Feeling sick and suffering from trapped wind
  • A hot, sour or salty tasting fluid in the back of your throat and difficulty swallowing

Heartburn during pregnancy

Heartburn is common during pregnancy, affecting 22% of women in the first trimester, 39% in the second and 72% in the third1. This is because during pregnancy your body produces the hormone, progesterone, which slows down digestion and causes the muscular valve between the oesophagus and the stomach to relax, increasing the risk of gastro-oesophageal reflux.

As a result stomach acid is more likely to leak into the oesophagus and cause a burning pain in your chest and throat. Also, as your baby grows, the pressure on your stomach increases and this can force stomach acid into the oesophagus, again causing gastro-oesophageal reflux. Calcium-based antacids such as Rennie® are used by over 50% of pregnant women to relieve heartburn symptoms and result in an 80% improvement in symptoms2,3

Rennie® is recommended as first time treatment for heartburn or indigestion in pregnancy as it works naturally within the stomach and oesophagus system only and does not enter into the mothers and baby's blood stream and harm the unborn baby2,3

It is important not to exceed recommended dose and avoid eating excessive milk/dairy products.


1: Source: Marrero JM, Goggin PM, de Caestecker JS, Pearce JM, Maxwell JD. Determinants of pregnancy heartburn. Br J Obstet Gynaecol 1992;99: 731-4
2: Broussard, C. N. and J. E. Richter (1998). ?Treating gastro oesophageal reflux disease during pregnancy and lactation: what are the safest therapy options? Drug Saf 19(4): 325-337.
3: Thomas, M. and S. M. Weisman (2006). Calcium supplementation during pregnancy and lactation: effects on the mother and the fetus. Am J Obstet Gynecol 194(4): 937-945.

Pregnancy & Heartburn

Recommendations

Rennie® Peppermint

Rennie® Peppermint

Rennie® Peppermint provides fast-acting, effective relief from heartburn and indigestion.

  • Rennie® Peppermint is an antacid tablet that neurtralises excess stomach acid
  • to relieve the symptoms of heartburn and indigestion, with a fresh mint flavour.
  • Rennie® Peppermint come in packs of 24’s and 48’s.

For a list of ingredients click here

Available in pharmacy and grocery.

Rennie® Spearmint

Rennie® Spearmint

Fast-acting, effective relief from heartburn and indigestion

  • Rennie® Spearmint is an antacid tablet that neutralises excess stomach acid to relieve the symptoms of heartburn and indigestion, with a fresh mint flavour.
  • Rennie® Spearmint come in packs of 24’s and 48’s.

For a list of ingredients click here

Available in pharmacy and grocery.

Rennie® Sugar Free Spearmint

Rennie® Sugar Free Spearmint

Rennie® Sugar-free provides fast-acting, effective relief from heartburn and indigestion.

  • A sugar-free remedy that's also fast and effective
  • Spearmint flavour
  • Rennie® Sugar-Free come in packs of 24's.

For a list of ingredients click here

Available in pharmacy and grocery.

Rennie® ICE

Rennie® ICE

Fast cooling relief

  • Treats heartburn and indigestion
  • Offers cooling and soothing relief
  • Rennie® ICE come in packs of 24’s

For a list of ingredients click here

Available in pharmacy and grocery.

Rennie® Orange

Rennie® Orange

Fast-acting, effective relief from heartburn and indigestion

  • Rennie - Orange starts to work in 2 minutes.
  • Handy blister sachets, easy to pop into your bag, wallet or pocket.
  • Safe to take during pregnancy*
  • Active Ingredient: 500mg Calcium Carbonate per tablet, equivalent to 200mg of Calcium

Available in pharmacy and grocery.

For a list of ingredients click here

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Frequently asked questions

  • Can I use Rennie® while pregnant or breastfeeding?

    Rennie® is suitable for the treatment of acid-related gastric symptoms during pregnancy and while breastfeeding as the ingredients, calcium and magnesium, occur naturally in the body and in food.

  • When would it be better for me to see a doctor?

    If you have persistent discomfort or warning symptoms (weight loss, difficulty swallowing, constant discomfort in the gastrointestinal region, persistent or blood-tinged vomiting, black stools), you should definitely see a doctor.

  • How much Rennie® should I take?

    All Rennie® products can be used during pregnancy if taken as instructed and if prolonged intake of high dosages is avoided. The usual dose is 1-2 tablets up to three times daily. This gives a maximum daily dose of 6 tablets. For more information, read the package leaflet and ask your doctor or pharmacist.

    Medicines can affect the unborn baby. Always talk to your doctor or pharmacist before taking any medicine during pregnancy.

Always read the label. If symptoms are severe or prolonged, you should consult a doctor or pharmacist.
If you are pregnant, medicines can affect the unborn baby. Always talk to your doctor or pharmacist before taking any medicine during pregnancy.

Information placed on this digital platform is not intended as a substitute for consultation with your healthcare professional

Heartburn is common during pregnancy, affecting 22% of women in the first trimester, 39% in the second and 72% in the third. This is because during pregnancy your body produces the hormone, progesterone, which slows down digestion and causes the muscular valve between the oesophagus and the stomach to relax, increasing the risk of gastro-oesophageal reflux.

Find out more about heartburn during pregnancy

Recommended products

Rennie® Peppermint

Rennie® Peppermint

Rennie® Peppermint provides fast-acting, effective relief from heartburn and indigestion.

Rennie® Spearmint

Rennie® Spearmint

Fast-acting, effective relief from heartburn and indigestion

Rennie® Sugar Free Spearmint

Rennie® Sugar Free Spearmint

Rennie® Sugar-free provides fast-acting, effective relief from heartburn and indigestion.

Rennie® ICE

Rennie® ICE

Fast cooling relief

Rennie® Orange

Rennie® Orange

Fast-acting, effective relief from heartburn and indigestion

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Pregnancy & Heartburn