bacterial infection
"I am allergic to penicillin and related drugs so my options mostly relate to tetracycline and its relations. For me that has been doxycyline. I have used it for respiratory & sinus/gum infections. This time I developed severe pain in the sinuses, significant discharge of  nasty mucus with coughing, body aches, and bilateral ear pain resulting in dizziness.  This occurred 3 days after I returned from a 14 day trip through the Southwestern states. Dr did a full exam. Temps were in 99.9 to 101.7 at first. It took about 4-5 days @ a dose 100x2 per day but it is working. I still have aches and ears still blocked somewhat with some dizziness but hoping that will clear. Tomorrow is day 7. Dr will check in@ day 10. So far so good."