Doxycycline is a widely used tetracycline antibiotic that slows down the growth of bacteria, therefore, helping your immune system fight the disease. The list of bacterial infections that can be treated with doxycycline includes periodontitis, urinary tract infections, gonorrhea, acne, and chlamydia. Doxycycline is also combined with other drugs to treat a number of other diseases related to bacteria. You mustn't try to combine this medicine with other drugs on your own, even if you think this may be effective in your case - only a qualified professional can make this decision based on the assessment of your general health condition with full knowledge of you medical history.
Nausea and vomiting, vaginal discharge or itching, upset stomach and diarrhea are common side effects that do not last long. If you experience any of these serious side effects you need to seek immediate medical attention: urinating less than usual or lack of urine, blurred vision, blistering and peeling, skin rash, body aches, fever and symptoms or flu, irregular heartbeat, and symptoms of an allergic reaction (skin rash, hives, trouble breathing, swollen lip, tongue, face or throat).