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Are Antacids Safe During Pregnancy? What Expecting Mothers Should Know

ByShivangi Sarkar
Updated: 12 Aug 2026, 1:27 pm

Heartburn is common during pregnancy, but choosing an appropriate antacid can be confusing, particularly when symptoms become frequent. Dr Y Divisha Reddy explains which antacid ingredients are generally considered suitable for occasional relief and which preparations pregnant women should avoid. Understanding the ingredients can help women make safer choices while protecting maternal comfort.

Pregatips
Heartburn and acid reflux can become particularly troublesome during pregnancy, leaving many women looking for quick relief. While antacids are widely available without a prescription, not every formulation is appropriate during pregnancy. We spoke to Dr Y Divisha Reddy, Consultant Gynaecologist & Obstetrician, Gleneagles Hospital, Fortis Network, Lakdikapool, to understand better.
In this article:
Knowing which ingredients are present is important before reaching for an antacid. Pregnant women should also avoid making regular use of these medicines without discussing their symptoms with their gynaecologist.


Are Antacids Safe in Pregnancy?

The edoctor explained in detail.


Calcium carbonate and alginate-based antacids are generally safe for occasional heartburn. Avoid high-dose sodium bicarbonate or magnesium trisilicate, especially near term. Before regular use consult your gynaecologist.Dr Y Divisha Reddy, Consultant Gynaecologist & Obstetrician, Gleneagles Hospital, Fortis Network, Lakdikapool

Calcium carbonate and alginate-based preparations can therefore be considered for occasional heartburn when recommended as appropriate for the individual. However, the specific formulation and dose matter, so checking the label is essential.


Which Antacids Should You Avoid During Pregnancy?

Dr Reddy advises avoiding high-dose sodium bicarbonate and magnesium trisilicate during pregnancy, particularly close to delivery. Pregnant women should not assume that every over-the-counter antacid is interchangeable simply because it is sold for heartburn.

It is also worth checking combination products carefully, as an antacid may contain more than one active ingredient. If you are unsure about a product, ask your pharmacist or gynaecologist before taking it.


When Should You Speak To Your Doctor?

Occasional heartburn may be manageable with an appropriate antacid, but persistent symptoms deserve medical attention. Speak to your gynaecologist if:

  • Heartburn is frequent or increasingly uncomfortable.
  • You need antacids regularly.
  • Symptoms do not improve despite treatment.
  • You are unsure whether a particular product is suitable during pregnancy.
Your doctor can assess the symptoms and recommend an appropriate treatment based on your stage of pregnancy and individual health needs.

Antacids can offer relief from occasional pregnancy heartburn, but the ingredients matter. As Dr Reddy emphasises, calcium carbonate and alginate-based options may be suitable, while high-dose sodium bicarbonate and magnesium trisilicate should be avoided. For regular symptoms, medical advice is the safest approach.


FAQs on Antacids During Pregnancy

  1. Are antacids safe during pregnancy?
    Some antacids may be suitable for occasional heartburn during pregnancy, but the ingredients should be checked first. Consult your gynaecologist before regular use.
  2. Which antacids should be avoided during pregnancy?
    Dr Y Divisha Reddy advises avoiding high-dose sodium bicarbonate and magnesium trisilicate, particularly near term.

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