Clarithromycin
"At first, I had horrible sickness with the tablets. I started them the day I got them because my doctor insisted I did so my pneumonia didn't get worse and the first two days were awful. I had the urge to be sick about ten minutes after taking the tablet and it would last mostly all day/night. I couldn't keep my food down so I lived off water, and then the sickness wore off and I was fine for the rest of the time taking them. My pneumonia has cleared up quite well and to be honest, the tablets smelt great and didn't taste all that bad. They have a lemon sherbet smell and taste to them. I did also experience a dry mouth and a nasty taste in my mouth a while after taking them, especially in the morning after sleeping."