noun. A toxic antimetabolite, C₂₀H₂₂N₈O₅, that acts as a folic acid antagonist to interfere with cellular reproduction and is used to treat psoriasis, certain cancers, and some inflammatory diseases such as rheumatoid arthritis.

noun. An antimetabolite and antifolate drug used in treatment of cancer and autoimmune diseases.

noun. toxic antimetabolite that limits cellular reproduction by acting as an antagonist to folic acid; used to treat certain cancers and psoriasis and rheumatoid arthritis

"An intravenous IV infusion of a medication called methotrexate may be used to abort the pregnancy or may be combined with surgery to ensure the full removal of pregnancy tissues."

antimetabolite  immune suppressant drug  immunosuppressant  immunosuppressive  immunosuppressive drug