I was started Sat. on doxycycline HYC 100 mg every 12 hours and prednisone 10 mg. 4 once daily for 5 days each. This was for suspected sinusitis, frequent chills, lungs good, ears good, throat okay. I also take Clonidine 0.1 mg 2 x a day, trazodone 50 mg one at night and atorvastatin 10 mg at bedtime. I have felt quite nauseated and have had dry heaves and slight vomiting in the evening after taking my atorvastatin, doxycycline and trazodone and clonidine. Haven t been able to keep these night time meds down. Is this a bad combination? I feel worse than when I went to Urgent Care Sat. Please cancel this question. Didn t realize there was a charge. Thank you.