Suggest Medications To Treat Gastritis

What may be some causes of gas. I don t have bloating with it or pain. It usually comes on about 10:00 daily, whether I eat anything or I don t eat. I have tried different food combinations, but nothing really helps. Although at times I don t have any gas. I am not constipated either. Gas X does not help. I eat a fairly healthy diet most of the time and a wide variety of foods. Probiotics make it worse. Do you know what could be causing it and how to avoid it. I thought the some part of my digestive tract is not functioning as it should, because of age. Although not old I am 63 years old.