Tiffany - posted on 12/04/2012 ( 1 mom has responded )
We recently switched our 4 week old son's formula from Similac Advance to Similac with lower iron because he was having a hard time pooping. Now he seems to projectile vomit with this new formula. We switched him 24 hours ago. Anyone have any suggestions as to why this is happening? We go see the doctor in 2 days but I don't really know what to do in the meantime.