sinusitis
"My symptoms of sinusitis grew rapidily over 24 hours BEFORE taking this antibiotic. I started out with allergy symptoms, Only on my left side. 8 hours into it I had a pounding  headache and my face and nose hurt really bad. I suffer from anxiety and had a bad experience last year while taking over the counter cold/allergy meds, so this year I was definitely not going to medicate myself up and decided to go to the doctor. my dr. visit was on the second day of being sick & I was full blown with what I thought had turned into a flu.Coughing was mild and mostly because i was dizzy so i felt nauseous and would cough. Chills,sweats,shakes,worst headache ever,nose and face hurt so bad. took 2 pills felt better in 5 hours"