Do you get Zantac as a syrup in a bottle- if so could you just up it a little anyway. My GP said that Alana could take up to 2 mls 3x a day and she is about 6.5 kilos- pounds I think thats about maybe 14 roughly.
I was concerned re the alchohol in the syrup- so the doctor has given effervesence tablets- maybe you could ask for these, just say you are worried re alchohol and then you could use more of the tablet- we are only using 1/2 a day whcih is = to about 1.3mls 3x a day of the syrup.
I put the tablet in the nipple of her bottle this morning and she sucked it down like you wouldn’t believe ( I think the bubbles meant she burped heaps better after her bottle later- bit like me when I partake in my fav-diet coke
Good luck with the pead GI!