Riley has been on Zantac since he was 5 weeks old, his inital dosage was 0.5ml 3 times a day, it has changed since then, my gp reacessed and i guess as he gets older and weight changes.. he is now on 1.4ml twice a day. i think that is quiet a high dosage, and i hope to take him off it soon, hopefully solids will make a differance!? fingers crossed!