Bronchitis
"Have been prescribed doxycycline for bronchitis, also have asthma and have been on Prednisone steroids along side the antibiotics. 

Side effects experienced:

Increased urination, Slow urine flow, Severe Kidney Pain, Headaches, Stomach pain, Yeast infection (Male).

Out of all the antibiotics ever in my system these have the worst side effects, the chest infection has passed in 5 days."