Are Rolaids safe during pregnancy?

What does the evidence say about Rolaids during pregnancy?

1. Rolaids Ultra Strength Mint lists calcium carbonate USP 1,000 mg and magnesium hydroxide USP 200 mg per chewable tablet as antacids, with directions to chew 2 to 3 tablets as symptoms occur, no more than 7 tablets in a 24-hour period, and not to use the maximum dosage for more than 2 weeks. 1
2. 1,000 mg of calcium carbonate is equivalent to 400 mg of elemental calcium, adult heartburn dosing ranges from 500 mg to 1,000 mg, and calcium carbonate limits the effectiveness of several drugs by decreasing absorption, with iron named specifically. 2
3. In pregnancy the calcium RDA is 1,000 mg a day for ages 19 to 50 with an upper limit of 2,500 mg, while the magnesium upper limit is 350 mg a day and applies only to supplemental magnesium, since magnesium in foods and beverages has no upper limit. 3
4. Antacids neutralize stomach acid and inhibit pepsin. Calcium carbonate is associated with constipation, acid rebound and milk-alkali syndrome, and antacids containing aluminum salts are described as safe in pregnancy while excessive use of calcium-containing antacids should be avoided. 4
5. Antacids can help relieve mild symptoms but should not be used daily or for severe symptoms without talking to a doctor, and their side effects include diarrhea or constipation. 5

Is Rolaids safe in each trimester?

• First trimester. Early on the practical issue is the calcium, not the acid. Calcium carbonate decreases the absorption of several medicines, iron among them, so a Rolaids habit taken alongside a prenatal deserves some spacing rather than same-glass timing.
• Second trimester. The arithmetic gets real here. Seven Ultra Strength tablets is 7,000 mg of calcium carbonate, which is about 2,800 mg of elemental calcium, against a pregnancy calcium upper limit of 2,500 mg a day for ages 19 to 50. The daily cap and the nutrient ceiling are not the same number.
• Third trimester. Late pregnancy is when antacids move from occasional to habitual. NIDDK's line is that antacids are for mild symptoms and should not be used daily or for severe symptoms without talking to a doctor. If you are at the label maximum most days, that is the signal to escalate the conversation, not the dose.

Rolaids Ultra Strength Mint against the pregnancy mineral ceilings