Hi mama! Ang antacids during pregnancy ay something you really need to check with your OB muna, okay? 'Cause kahit common ang heartburn during pregnancy, hindi lahat ng medicines ay safe for baby, kaya better safe than sorry talaga. A few of my mum friends had the same concern, and sabi ng kanilang doctors, may specific ones na okay during pregnancy, pero it's case-to-case, depending sa baby and your health. Please ask your doctor what's safest for you and baby, mama. Sending you comfort!