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 acid 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.

All Rennie products can be used during pregnancy if taken as instructed and if prolonged intake of high dosages is avoided.

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