IMUTREX 2.5MG contains methotrexate which belong to a group of medicines called folate antagonist. It can be used to treat severe cases of psoriasis and rheumatoid arthritis. It can also be used to treat several kinds of cancer. Psoriasis is an autoimmune disorder that causes your skin cells to grow and multiply much quickly than normal cells. Methotrexate kills the rapidly multiplying cells in the skin. In rheumatoid arthritis, methotrexate reduce inflammation in joints by altering body’s defence mechanism in immune system. In cancer, methotrexate inhibits the enzymes responsible for nucleotide synthesis and prevents cell division.