helicobacter pylori infection
"I'm on day 9.  Number one side effect for me has been inability to focus on one thought for more than a few seconds, which has affected my work.  It really is a brain fogger!  On day 5, the metallic taste/sour mouth was pretty awful all day, but it abated gradually over last few days.  If I don't drink a lot of water (20 oz or more) with each dose, my urine is very dark, which is scary, but drinking more water does help.  I agree with the comments that you should eat a full meal with each dose, even at bedtime.  It is rough doing the schedule and getting in the food, water and pills four times a day.  On a few days I had to set an alarm and get back up at midnight or 1 am to take the last dose.  Stick with it, power through the 10 days."