Treatment for acid reflux or GERD (Gastroesophageal Reflux Disease) can include change in lifestyle, medication or both. Neither requires discontinuation of breast feeding. I'd recommend: 1) avoiding all aspirin and non-steroidal anti-inflammatory drugs (NSAIDS),citrus juices, coffee, alcohol, vit C, iron pills, anti oxidants, and avoid meals within three hours of sleep. 2)If dietary/lifestyle adjustment alone doesn't help I'd add famotidine (Pepcid) 20 mgs twice a day (it has the lowest milk:plasma ratio of any of the "H-2 Blockers"). This medicine suppresses acid production to decreases symptoms of reflux. I've used this without problem in both pregnant and breast feeding moms. 3) If dietary change and pepcid doesn't help, my next step would be the addition of propulsid 10mgs 4 times a day (1/2 hour before meals and before sleep). This medicine tightens the barrier between the acid producing stomach and acid sensitive esophagus. It's levels in breast milk are fairly low and it's been used in infants with reflux and vomiting and so is safe for infants. Hope this helps! Peter Salomon, MD, FACG Board Cerified Gastroenterologist Boca Raton, Fl