Methotrexate (By mouth)
Antineoplastic Agent, Antipsoriatic, Antirheumatic, Cytotoxic (About this – PubMed Health)
Uses of This Medicine
Methotrexate is used to treat adults with severe rheumatoid arthritis and children with polyarticular juvenile idiopathic arthritis who had other treatments that did not work well. It is also used to control symptoms of severe psoriasis in adults who have not been helped by other treatments.
Methotrexate belongs to the group of medicines known as antineoplastics (cancer medicines). It blocks an enzyme that is needed by cells to live. This interferes with the growth of cancer cells, which are eventually destroyed by the body. For patients with arthritis or psoriasis, methotrexate may work by improving the immune system.
This medicine is available only with your doctor’s prescription.
Once a medicine has been approved for marketing for a certain use, experience may show that it is also useful for other medical problems. Although these uses are not included in product labeling, methotrexate is used in certain patients with the following medical conditions:Acute myeloid leukemia (blood and immune system cancer). Bladder cancer. Brain lymphoma (tumor). Bullous pemphigoid (immune system disease). Cancer of the penis. Crohn disease (intestine or bowel disease). Eye lymphoma (tumor). Felty syndrome (condition with rheumatoid arthritis, large spleen, and low white blood cells). Hodgkin disease (lymph system cancer). Ovarian cancer (ovaries). Soft tissue sarcoma (tumor in connective tissue). Systemic lupus erythematosus (immune disease). Urinary tract cancer (urine system).
Other uses (PubMed Health)
How To Use
Medicines used to treat cancer are very strong and can have many side effects. Before receiving this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.
Your doctor will tell you how much medicine to use. Do not use more than directed. The correct schedule for this medicine is different for arthritis, psoriasis, and different kinds of cancer. For example, people who have arthritis or psoriasis often take this medicine only once a week.
Make sure you understand your personal dosing schedule. Ask your doctor and pharmacist if you are not sure when or how often to take your medicine.
If you take the medicine only once a week, it is best to take it on the same day each week.
Write down on a calendar or piece of paper when you are supposed to use your medicine. Keep the calendar or paper where you can see it. After you take your dose of medicine, cross off that date on your calendar or paper. This will help you remember if you took the medicine or if you still need to take it. If you need other ideas to help you keep track of your schedule, ask your pharmacist or other healthcare provider.
If a dose is missed:
Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.
If you use this medicine only once a week and you miss a dose or forget to use your medicine, skip the missed dose and use your medicine as soon as possible. Return to your regular schedule the following week. Do not use extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine:
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
Keep all medicine out of the reach of children. Never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
There are many drugs that can interact with methotrexate. Some of these drugs are aspirin, phenytoin (Dilantin®), theophylline (Theo-Dur®), antibiotics (such as penicillin, tetracycline, Bactrim®, Septra®), and vitamin supplements that contain folic acid. Make sure your doctor knows about ALL other medicines you are using.
If you have bone cancer, ask your doctor if you need to avoid using pain or arthritis medicine (such as aspirin, diclofenac, ibuprofen, indomethacin, Advil®, Aleve®, Bextra®, Celebrex®) or steroid medicines (such as prednisone).
If you have arthritis, make sure your doctor knows about all other medicines you are using to treat arthritis (such as aspirin, gold, ibuprofen, prednisone, sulfasalazine, Azulfidine®, Celebrex®, Plaquenil®).
Tell your doctor if you have used methotrexate before for any reason.
When Not To Use
You should not use this medicine if you have had an allergic reaction to methotrexate or if you are breastfeeding. You should not use this medicine for arthritis or psoriasis if you are pregnant, or if you have liver disease or certain problems with your blood or immune system. Make sure your doctor knows if you drink alcohol of any kind on a regular basis.
Using this medicine while you are pregnant can harm your unborn baby. The medicine may also cause birth defects if the father is using it when his sexual partner becomes pregnant. Use an effective form of birth control during treatment with methotrexate. For a man, continue birth control for at least 3 months after stopping treatment. For a woman, continue birth control until you have had two menstrual periods after stopping treatment. If a pregnancy occurs while you are using this medicine, tell your doctor right away.
Make sure your doctor knows if you have kidney disease, liver disease, a stomach ulcer, colitis, diabetes, hepatitis, HIV or AIDS, problems with your immune system, or any kind of problem with your blood (such as anemia). Tell your doctor if you get an infection of any kind.
This medicine may make your skin more sensitive to sunlight. Wear sunscreen. Do not use sunlamps or tanning beds. Tell your doctor if you have increased skin redness or other problems.
Your doctor will need to check your progress at regular visits while you are using this medicine. You may need to have blood tests or other kinds of medical tests. Be sure to keep all appointments.
Call your doctor right away if you think you have taken too much of this medicine.
Possible side effects
Summary More details
Call your doctor right away if you notice any of these side effects:
Eyes or skin turn yellow, or dark-colored urine or pale stools
Sores or white patches on your lips, mouth, or throat
Unusual bleeding, bruising, or weakness
If you notice these less serious side effects, talk with your doctor:
If you notice other side effects that you think are caused by this medicine, tell your doctor.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
More side effects of this drug
Brand names include
Rheumatrex Dose Pack, Trexall
There may be other brand names for this medicine.