Half a liter in one day still to much for a 155 pound male?

About two weeks ago I would be drinking half of the 1.75 liter Evan Williams bottled in bond whiskey each night. Now it’s half of a liter with regular bottom shelf vodka. Cutting down is a bitch but I was wondering if I still need to cut down more or if drinking somewhat moderately (for me) would help my horrible stomach issues