Tetracycline is an antibiotic available by prescription that can be used by people diagnosed with any of the infections caused by bacteria. Do not share tetracycline with other people and keep it out of the reach of children and other people to whom it was not prescribed. If you think you are not benefitting from the treatment talk to your health care provider but do not stop taking tetracycline as a relapse of infection can occur. It's very important that you report any side effects that seem strange or severe to your health care provider. The following side effects are considered to be serious enough to be immediately reported to your doctro: blurred vision, easy bleeding and bruising, peeling, flu-like symptoms, fever, loss of appetite, blistering and red skin rash, trouble breathing, severe stomach pain, fever and confusion chills and body aches, as well as unusual weakness, pale skin, or yellowed skin. If you are currently taking any of the following medicines you may not be able to take tetracycline or your health care provider will adjust your dose: any supplements, antacids, minerals (zinc, iron, calcium, magnesium), cholesterol-lowering medications, blood thinners, bismuth subsalicylate products, penicillin antibiotics (dicloxacillin, carbenicillin, penicillin, oxacillin and amoxicillin), isotretinoin, tretinoin. If there are any other drugs you are taking but they have not been mentioned here talk to your health care provider about the consequences of combining them with tetracycline as well.