Doxycycline.

Doxycycline is intended for the treatment of infections caused by the presence of bacteria. Your health care provider may prescribe this antibiotic to treat respiratory infections and urinary infections. Make sure you take this drug exactly as prescribed without exceeding the dose recommended or taking doxycycline for longer than necessary. Also make sure you do not stop the treatment as soon as you feel better you will need to take doxycycline for as long as recommended to make sure your infection has been completely treated. The following medications can cause interactions and therefore must be reported to you health care provider: blood thinners, isotretinoin, minerals, penicillin antibiotics, over-the-counter vitamin and mineral supplements, cholesterol-lowering medications, antacids, and tretinoin. Make sure you let your doctor know if you suddenly develop serious side effects of doxycycline, such as redness of the skin, severe headache, yellowing of the skin or eyes, blurred vision, decreased urination, confusion, loss of appetite, skin rash, upset stomach, difficulty breathing, vomiting, itching, dark-colored urine, or stomach pain, as your treatment may not go as planned and needs to be revised.