Methotrexate is used to treat certain types of cancer or to control severe psoriasis or rheumatoid arthritis that has not responded to other treatments. It may also be used to control juvenile rheumatoid arthritis. Methotrexate belongs to a class of drugs known as antimetabolites. It works by slowing or stopping the growth of cancer cells and suppressing the immune system.
Temporary hair loss may occur. Normal hair growth should return after treatment has ended. Mouth sores, diarrhea, signs of anemia (such as unusual tiredness, pale skin), signs of liver problems (such as dark urine, persistent nausea/vomiting, stomach/abdominal pain, yellowing eyes/skin), easy bruising/bleeding, black stools, enlarged glands/lymph nodes, bone pain, unusual pain and discoloration of the skin, signs of kidneyproblems (such as change in the amount of urine), dry cough, muscle weakness, weakness on one side of the body, neck stiffness, severe headache, vision changes, irregular heartbeat, mental/mood changes, seizures.
This medication may lower your ability to fight infections. This may make you more likely to get a serious (rarely fatal) infection or make any infection you have worse. Tell your doctor right away if you have any signs of infection (such as fever, chills, persistent sore throat, cough).
Reducing the toxic effects of methotrexate and certain other medicines (folic acid antagonists). It may also be used to treat other conditions as determined by your doctor.
Leucovorin is a folic acid derivative. Methotrexate and the folic acid antagonists block the body's production of folate. Leucovorin works by replacing folate in the body.
Though these are very rare, Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); fainting; seizures.
Nausea, vomiting, loss of appetite, diarrhea, headache, dizziness, and pain/swelling/redness at the injection site may occur. Nausea and vomiting can be severe. In some cases, drug therapy may be needed to prevent or relieve nausea and vomiting. Not eating before your treatment may help relieve vomiting. Changes in diet such as eating several small meals or limiting activity may help lessen some of these effects.
Temporary hair loss may occur. Normal hairgrowth should return after treatment has ended. Fever with body aches, muscle/bone pain, chest pain, eyeredness/itching/pain, painful/difficult swallowing, anal sores, signs of kidney problems (such as change in the amount of urine), painful/difficult urination, joint/side/back pain, pain/redness/swelling of the arms/legs/feet, numbness or tingling of hands/feet, freckling, big toe pain, trouble breathing, black/bloody stools, blood in the urine, vomit that looks like coffee grounds, vision problems (including blindness), mental/mood changes (e.g., confusion), unexplained drowsiness, unconsciousness, enlarged abdomen, trouble walking, muscle weakness, loss of coordination, inability to move (paralysis), seizures.
This medication can lower the body's ability to fight an infection. Notify your doctor promptly if you develop any signs of an infection such as fever, chills, unusual cough, or persistent sore throat.
A very serious allergic reaction to this drug is unlikely, but get medical help right away if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.