Sinusitis
"I took this medicine for a sinus infection. Worked great for that but the side effects for me were unbearable.  On day 7 of the medicine I had the worst stomach cramps that I have ever had and diarrhea. Sleepiness was a constant, slept all day and night. Had no desire to eat at all.  Had chills, cough, fever, severe headaches, irritability, heartburn and greatly decreased frequency of urination.  "