Acidity & paining in stomach. / health.

Since last 3-4 days my father stomach is paining & acidity is occuring & he is not able to a single bite . From last 3-4 days the health is in very trouble. Acidity & obesity is not reducing even the stomach is full empty then also gas is producing, we r not able to understand how this is occuing, so i request u to prescript me the proper medicines & advice me the prescription & treatment for the above problem , so my father het relief from the pain. The medicines they r taking regularly is Glynase - mf for sugar- 2 tablets/day. Udp-at for BP - 1tablet / day. So please consider this dosage & prescibe the medicines for the problem accordingly. I request u to advice the medicines which is very procuritive with  very least side effect. As high power medicines is not suitable to their body / health. Thanking u.