sinusitis
"I have taken this medicine many many  times before  and it has alway worked with no problems.I have had serious stomach issues this time around..slightly since day one..tonight is day 4 and I just experienced severe abdominal cramping and pain....loose stools (tmi)..so severe I though I would have to go to ER..started about 10 minutes after taking athe pill. .not on a empty stomach Iate about 1 hour prior...maybe just a freak think but very scary..a few hours went by and I'm starting to feel better...not sure if I will take last pill l tomorrow"