Upper Respiratory Tract Infection
"I&#039;ve been taking Doxycycline for a few days now for bronchitis/pneumonia. I take it twice a day. The dose in the morning makes me nauseous and I vomited once. Other than the extreme list of interactions with food and other medications, I would take it again for my illness. It&#039;s potent and so far seems to be clearing up my lungs and sinuses!"