upper respiratory tract infection
"This gave me horrible stomach cramps.  I had NO pressure or congestion.  Day 3 of these and I can't breathe and out of my nose and the pressure is excruciating.  I feel like my head is going to explode.  Mega dosing with vitamin c next time. No side effects.  I am not finishing this crap.  I never stop an antibiotic early but this is the worst."