Hi mummab
my bub has been on zactac for 2 mths and we saw a little improvment in that time but we seen a ped specialist yesterday who said zactac can give some bubs bad colic pains and its not generally given any more. maybe you should ask to see a specialist (we paid to see a private one so we could see them alot sooner). She uses losec instead.
Also if bub is really upset we were told to give 2ml of mylanta
got to go 4 year old needs some love
hope this helps