sinusitis
"I was prescribed this medication for sinus infection and fluid in ear. I have on my charts that I am allergic to penicillin but not sure of reaction.  So doctor said this has 1% of penicillin derivative.  So I tried it!  First 2 days sinus seemed to get better.  Then 6, and 7th day I had horrible a headache, ear aches, facial skin burning, chills and sweats.  I couldn't lift my head off pillow.  Took myself off the medicine and next day I was feeling  better.  Still have a lot of congestion but the pain in my head is gone.  I feel like my head was deflated.   This has to be an allergy!  I learned my lesson."