Trade names: Otrexup™, Rasuvo®, Rheumatrex®, TrexallTM. Other names: Amethopterin, Methotrexate Sodium, MTX. Methotrexate is the generic name for the trade drug names Otrexup™, Rasuvo®, Rheumatrex® and Trexall™. MTX, Amethopterin, and Methotrexate Sodium are other names for Methotrexate. In some cases, health care professionals may use the trade names Otrexup™, Rasuvo®, Rheumatrex® and Trexall™ or other names MTX, Amethopterin, and Methotrexate Sodium when referring to the generic drug name Methotrexate.