bacterial infection
"I have been suffering from chronic sore throats for over a year and have had a horrible time with ups and downs of feeling well and then suddenly sick to the point where I had to miss work, like death.  Doctors kept telling me "oh it's just a virus and will pass".  It always came back.  Finally my doctor tried a shot of Rocephin  and it started to work within a couple HOURS.  I still felt sick the next day and had to miss work and wound up in ER the following evening due to extreme migraine  headache, high BP, nausea but I think it was from the doxycycline that was also given to me to take orally.  Was a VERY rough night.  But the next day I felt 100% better and I've been feeling so much healthier since.  Like a miracle!"