my 89 yr. old mother has been using Pepto Bismal daily, sometimes twice a day for most of this year. She s had hearing problems for several yrs. It is worse after she takes Pepto. She s fatigued. She has had chronic stomach problems for over 40 yrs. She complained of heartburn this morning before breakfast. What can she do to check on her acid/base condition of her stomach? And what can she do to correct if an imbalance/too acidic?