Suggest Supplement To Be Taken Along With Primolut-N To Avoid Gastritis

Doctor prescribed Primolut-n(10 tablets for total 5 days-2 times a day) to delay my periods to plan IVF. I have a sensitive stomach, I read this tablet has lot of stomach related side effects. By the time I take this medicine, I need to travel as well. Please suggest any vitamin supplement to be taken along to avoid any stomach related problems like gastric, acidity,etc.,