Heartburn Medicine in Pregnancy

Safe heartburn medication during pregnancy is one of the most common questions in the third trimester, when hormonal changes and a growing uterus make reflux dramatically more common than usual. The good news is that several options are generally considered safe in pregnancy, but “generally safe” still means checking with your midwife or doctor before starting anything, since individual pregnancies and medical histories vary.

Why heartburn is so common in pregnancy

Rising progesterone relaxes smooth muscle throughout the body, including the lower esophageal sphincter discussed in our guide to acid reflux during pregnancy, making it easier for stomach acid to move upward. Later in pregnancy, the growing uterus adds physical pressure on the stomach, compounding the effect. This is why heartburn tends to get more common and more intense as pregnancy progresses, particularly in the third trimester.

What’s generally considered safe to try first

• Calcium carbonate antacids (like Tums) are commonly recommended as a first-line option, giving fast, short-term relief
• Alginate-based products (like Gaviscon) form a barrier on top of stomach contents and are widely used in pregnancy
• Lifestyle changes first, including smaller meals, not lying down soon after eating, and avoiding personal trigger foods, are usually recommended before or alongside any medication

What to avoid without checking first

Some medications and remedies aren’t well studied in pregnancy or are specifically discouraged, including certain herbal remedies and some combination products. This is exactly why “natural” doesn’t automatically mean “pregnancy-safe,” and why anything beyond a standard antacid deserves a quick check with your midwife or doctor, including over-the-counter products you might otherwise consider without a second thought.

Some reflux guides sold online claim that antacids are not safe in pregnancy. That is not what mainstream guidance says: calcium-based antacids are generally considered acceptable in normal amounts, while sodium bicarbonate is usually approached with caution because of its sodium load, and some magnesium-containing products are treated more carefully, especially late in pregnancy (see this 2022 review). Advice varies by source, so confirm the specific product with your midwife or doctor.

Dosing and how long to use it

Even with medications considered safe in pregnancy, using the lowest effective dose for the shortest time that controls symptoms is the general approach, rather than continuous use “just in case.” If an antacid or alginate isn’t controlling symptoms within the guidance on the label, that’s the point to check in with your provider rather than simply increasing how often you take it.

If you’re considering a broader lifestyle approach

Some pregnant readers look for a more structured plan alongside medication advice from their provider. Whatever you consider, clear any remedy, supplement or program with your own midwife or doctor first, since general-audience guides can’t account for your specific pregnancy.

FAQ

Is it safe to take Tums every day during pregnancy?

Calcium carbonate antacids are commonly used in pregnancy, but daily long-term use should still be discussed with your provider, particularly regarding total calcium intake.

Can I take omeprazole while pregnant?

PPIs are used in pregnancy when needed and considered acceptable by many providers, but they’re usually reserved for when simpler options haven’t worked. Check with your doctor before starting one.

Are natural remedies safer than medication for pregnancy heartburn?

Not automatically. Some herbal remedies aren’t well studied in pregnancy, so “natural” doesn’t guarantee safety. Check anything beyond diet changes with your midwife or doctor first.

When does pregnancy heartburn usually go away?

For most people, it improves significantly after delivery, though some notice gradual improvement in the final weeks as the baby drops lower in the pelvis.