Tramadol is an oral tablet medication available as an immediate and extended-release form. You can buy Tramadol online as extended oral pills. The immediate-release version is released into the body immediately. Extended-release medications spread into the body slowly over time. The medicine is available as a generic medication. The immediate-release tablet is also accessible as the brand version known as Ultram. The extended-release form of the brand version is known as Ultram ER. Usually, generic medications are less costly than the brand version, and in most cases, they may not be accessible in all forms or strengths as the brand-name version.