upper respiratory tract infection
"Been given Clarithrimycin 500mg for chest infection. Been on meds 2 days. The after taste at the back of your mouth  is extremely vile. I can taste it a few hours after taking it. It's that vile the taste wakes me up..I try to swish it away with water but it's still there. The last tablet I took was 10 hours ago the taste my mouth is still dreadful. 
Not sure whether this medication is helping as still coughing like a trooper. I was less anxious when I read on this thread that it wasn't  me going crazy and others suffered from heart palpitations, shortness of breath, tight chest and anxiety (I can't break thoughts).  Its a dreadful feeling, have to finish the course but will never be taking this med again- 5 more days to go :-/"