Tetracyclines refer to a group of antibiotics that are used to treat bacterial infections. Some of the synonyms for tetracyclines include doxycycline, minocycline, oxytetracycline, and chlortetracycline. These antibiotics work by preventing the growth and spread of bacteria in the body, helping to combat a range of infections. Tetracyclines are commonly prescribed for urinary tract infections, respiratory infections, skin infections, and sexually transmitted diseases. While they are effective at treating bacterial infections, tetracyclines should only be taken under the guidance of a medical professional, as they can cause side effects such as nausea, vomiting, and diarrhea when overused or taken incorrectly.