bacterial infection
"Just took my first dose and got in the shower and immediately felt severe heartburn. Worst heartburn ever. It made my ears hurt. I thought I was dying. I had to tell my 7 year old if something happens and you can't wake me up call 911 and tell them our address. It was that bad. I drank a full bottle of water after seeing what everyone else said and the heartburn is still there but not severe anymore. I didn't even lay down before the heartburn started so now I'm scared to go to bed in case it gets bad again."