TOXYLACT

The first professional lActological database in the word

Calcium-containing antacids (ATC class A02AC, mainly calcium carbonate) are considered compatible with breastfeeding when used in standard doses and for short-term relief of dyspepsia or heartburn. They act locally in the maternal gastrointestinal tract, have minimal systemic absorption, and do not significantly alter breast milk composition or harm the nursing infant when the total daily calcium intake remains within recommended limits.

Calcium-containing antacids (ATC A02AC) are widely used for the short-term relief of heartburn, acid indigestion and dyspepsia in breastfeeding women. These products, most often based on calcium carbonate, neutralize gastric acid locally in the stomach and exhibit limited systemic absorption, so only very small amounts, if any, are expected to reach breast milk.

Current lactation references and clinical experience classify antacids, including calcium salts, as compatible with breastfeeding, and they are recommended as first-line therapy for otherwise healthy nursing mothers with mild gastrointestinal symptoms. Calcium intake during lactation should usually be around 1–1.3 g elemental calcium per day, and supplementation or antacid use within this range does not significantly change milk calcium concentration or pose a risk to the infant. However, prolonged use of high doses that raise total calcium intake above approximately 2.5 g per day should be avoided because of possible maternal adverse effects such as hypercalcemia or milk-alkali syndrome.

When prescribing or recommending calcium-containing antacids in the postpartum period, clinicians should assess overall dietary and supplemental calcium intake, renal function, and concomitant medications. Short-term, on-demand use at over-the-counter doses is generally considered safe in mothers of term, healthy infants, and no specific monitoring of the breastfed child is usually required. As with all pharmacotherapy in lactation, individualized risk–benefit assessment and patient counselling about correct dosing, duration of therapy and when to seek medical advice remain essential.

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