upper respiratory tract infection
"I went to the ER because I thought I had bronchitis. Turns out it was a Upper Respiratory Infection. I was given the Z-pak 500mg and was told to take the 2 pills as a first dose which was around 8:00pm. The next morning, I felt a lot better than the previous day and continued the regiment.  But on the 3rd day I was nauseous and had this HORRIBLE metallic taste in my mouth.  Now it's the 4th day and I can't stand this taste.  However, the nasty coughing and the phlegm is pretty much gone.  "