Yes, if you need to.
Taking antacid or acid-suppressing (PPI) medication and training with IQoro at the same time should not be problem. It may sometimes be advisable to continue taking medication for a period of time while training. When your training starts to deliver results, your symptoms will improve and you will have less need for relief. Only then can you stop taking antacid medication.
However, it is always recommended that you consult your healthcare provider about how best to reduce your use of medication.