What to use in case of feeling that something "stood on my stomach"?

Mesopral is a prescription preparation and should be used if you have been prescribed by your doctor - according to his indications. The preparation reduces the amount of hydrochloric acid in the stomach, can be used in gastroesophageal reflux disease, stomach ulcers, pancreatic adenoma. Your entry shows that the current ailments are unlikely to be related to the above-mentioned diseases, but probably to taking a tablet of vitamins of the Center. Sometimes too large a tablet, drunk with too little liquid can give gastric symptoms similar to those described. If these symptoms occurred after taking the pill and persist for a short time, it may be helpful to drink an extra amount of neutral fluid. Since in the second post you wrote that you also take the drug Debretin, I suppose that you are already treating some ailment of the gastrointestinal tract. In this situation, it is difficult for me to advise you on what other steps you could take to bring relief to yourself. I suppose that a visit to the pharmacy, where the professional staff will be able to ask you additional questions, or to the doctor (if the ailments are severe) may be helpful. I enclose materials about the drug Mesopral: https://www.gdziepolek.pl/produkty/48500/mesopral-kapsulki/ulotka and our studies on digestive problems, you may be interested in: https://www.gdziepolek.pl/tematy/leki-na-trawienie https://www.gdziepolek.pl/tematy/trawienie-i-uklad-pokarmowy https://www.gdziepolek.pl/tematy/najlepsze-sposoby-na-swiateczne-przejedzenie https://www.gdziepolek.pl/tematy/kiedy-bol-brzucha-to-atak-woreczka-zolciowego https://www.gdziepolek.pl/tematy/bol-brzucha https://www.gdziepolek.pl/tematy/jak-radzic-sobie-ze-zgaga