I’m going to start my 7 week old on gaviscon for reflux but I’m not sure what dosage will work best. The instructions say one sachet up to 6 times a day but I’m worried about constipation, and the dose being too much while he’s still young, would half a sachet in each bottle do the trick (I mean half of just one sachet, not the duo)? He has 6 bottles in a 24 hour period. He’s 14lbs so he’s a big lad for his age.