bacterial infection
"I took the medication for a sinusitis infection  twice a day as directed by my doctor.  on the morning of the fourth day I woke up to vomiting and diarrhea.   over the next day and a half I continued to vomit and run to the bathroom for diarrhea about once every hour or two... Pure hell.  The worst part about it was the nausea...  kind of like a bad trip where I was constantly very very stressed out.  it has now been six days  and the nausea has not completely gone away.  it is very scary how antibiotics can affect us physically and mentally.  my doctor did prescribe a medication for the nausea that I take every eight hours and that does help a lot."