Birch leaves and buds are too cures ulcer.

100 gr.of dried on the sun of young buds and leaves of birch to add in a bottle,ads one l. of spirit,close a  paper s lid,and infuse two months on sun,filter,and drinks one tea.sp. for 1/3 glass of water before the meal a few times/day.

One tbl.sp. dried of buds and leaves ads into glass of hot water, infuse till cooling,filter,drinks one tbl.sp. for 5 times/day before meal.
And do not use against functional kidneys failure on pregnancy stage.