Bronchitis
"I went to the ER after I coughed up blood a few times thru the day, and I was diagnosed with acute bronchitis. I was prescribed the zpack 5 day regimen. 
After a couple of days I began feeling a little better, but by the 5th or 6th day, I felt worse. I had severe nausea and became anorexic to the point that I lost 14 pounds. It took about another 4-5 days until I could eat more than a bite or so of food at any sitting. 
It&#039;s been around a month and a half since this happened, and I&#039;m still having issues with my appetite and weight. I&#039;m still down the 14 lbs, and my energy flags easily. I&#039;ll never EVER take that med again due to such an experience. I&#039;ve had fine success with other antibiotics, without them being this hard on my gut."