Since they switched from the old formula to the new formula of Oxycotin I have had to take alot of antacids.Because I wake up in the middle of the night and have stomach acid in my mouth,its almost like the flap in my stomach doesn't close all the way.Also if I take the new formula and don't take any antacids before taking the Oxycotin the next day I wake up throwing up and have a severe headache.I also noticed that after I take the medication if I drink a glass of milk its almost like my heartburn goes away for a little while,but it does not relieve the heartb urn completly.