Peppermint oil capsules with meals might help. I've also heard Turmeric disolved in warm water is benefitial.
If she is in no pain, I would suggest an anti-gas medication which is sold over the counter. Chewing gum, hard candy, and eating too fast adds to this problem. My husband has acid reflux and the only thing that helped him was Prilosec which is also over the counter. None of the prescription meds worked for him.