Tetracycline refers to a group of antibiotics that are used to treat various bacterial infections. However, there are several other related terms that are often used interchangeably with tetracycline. These include doxycycline, minocycline, oxytetracycline, and demeclocycline. All of these drugs belong to the same class of antibiotics and work by inhibiting bacterial protein synthesis. While they differ slightly in their chemical structure and overall effectiveness against different types of bacteria, they are all used in the same way to combat infections ranging from acne to urinary tract infections. If you are prescribed tetracycline, it's only a matter of personal preference whether you choose to use a synonym instead.