Hi all i was just wondering which is a good ref...

Hi all i was just wondering which is a good reflux formula?. My lil man has been diagnosed with chronic reflux :'( and has been given a course of tablets and i have been told to change his formula to an anti reflux one for his top up feed. As he is still being breastfed and topped up with a bottle. Any help will be mostly appreciated. thanks in advance Aleks