What is methotrexate?
Methotrexate is a powerful medication with a variety of uses, most commonly for treating cancer, arthritis, and psoriasis. Understanding methotrexate uses and side effects is important, as the drug works by slowing cell growth and suppressing the immune system to reduce inflammation and abnormal cell activity.
Common methotrexate uses and how it works
Methotrexate is used to treat:
- Certain types of cancer. These include breast cancer, lung cancer, some cancers of the head and neck, leukemia, and certain types of lymphoma. It slows or stops the growth of the cancer cells.
- Severe rheumatoid arthritis (RA). In this autoimmune disease, the body attacks its own joints. This causes pain, swelling, and loss of function in the joints. Methotrexate suppresses the immune system, which helps symptoms of RA.
- Psoriasis. This is a skin disease that causes red, scaly, itchy patches to form on the body. Methotrexate slows the growth of skin cells. This keeps scales from forming. It’s used when other treatments don’t help.
Other conditions treated with methotrexate
Methotrexate (brand names: Rheumatrex and Trexall) also can be used to treat Crohn’s disease, multiple sclerosis, and other autoimmune diseases.
How to take methotrexate
Methotrexate is usually taken by mouth as a tablet. Sometimes it is given as a shot. The dosage and how often you take it depends on why you’re taking it. Some people take it on a rotating schedule of alternating days. People with RA or psoriasis often take it once a week.
It’s a strong medicine, so it’s important to take it exactly as your doctor tells you. Some people have mistakenly taken it once a day instead of once a week. They experienced very serious side effects, including death. NEVER change the amount you take or the time of day you take this medicine.
If you forget a dose, talk to your doctor before you take another dose. It can take weeks or months before you feel the full effects of methotrexate. Don’t take more of it to try to speed up the process. Taking too much can cause harmful side effects.
Always talk to your doctor before stopping this medication.
Understanding methotrexate uses and side effects can prevent dangerous errors and support safe use.
If you’re having joint pain, tell your family doctor. Treating early can help prevent or reduce lifelong disability. Read More
Understanding methotrexate side effects and risks
Methotrexate may cause side effects. The most common include:
- Dizziness
- Drowsiness
- Headache
- Loss of appetite
- Mouth sores
- Nausea (and sometimes vomiting)
- Reddened eyes
- Swollen, tender gums
- Thinning hair
Be sure to tell your doctor about any side effects you have.
When to contact your doctor about side effects
Some side effects can be serious. Call your doctor right away if you have:
- A fever or feel as if you have the flu
- Diarrhea
- A nagging cough
- Shortness of breath
- Any unusual bruising or bleeding (including blood in the stool, or black, tarry stools)
- Blurred vision or loss of vision
- Confusion
- Weakness or difficulty moving one or both sides of your body
Methotrexate can cause other side effects, too. Call your doctor right away if you experience any unusual problems while taking this medicine.
Tips for safe methotrexate use and monitoring
Because of the potential risks tied to methotrexate uses and side effects, regular monitoring is important. You’ll need blood tests to check liver and kidney function as well as blood cell counts. These help your doctor adjust your dose or stop treatment if necessary. It’s important to keep every appointment with your doctor.
Do not drink any alcohol, not even beer or wine. Drinking alcohol while you’re taking methotrexate can cause serious liver problems.
Avoid taking medicine for pain or inflammation unless your doctor tells you it’s okay. This includes over-the-counter pain medicine such as NSAIDs. Examples of NSAIDS are ibuprofen (Advil) or naproxen (Aleve). Pain medicines can increase the effects of methotrexate, which can be bad for you.
Do not take any vitamins, supplements, or herbal products without talking to your doctor first. These can cause serious damage to your body.
Don’t get any vaccines (shots) while you’re taking methotrexate. If you’ve stopped taking methotrexate, talk to your doctor to make sure that it’s okay to get a vaccine.
Taking methotrexate can make it easier for you to get an infection. Try to avoid people who are sick.
Methotrexate and pregnancy
Don’t take methotrexate if you or your partner are pregnant, trying to get pregnant, or breastfeeding. It can hurt your baby. Even touching or inhaling the dust from the tablet can allow the medicine to get into the body. Methotrexate goes into sperm, so it’s important that a man taking it doesn’t get his partner pregnant.
Whether you’re male or female, you must use birth control while taking methotrexate. You can take birth control pills, use a condom plus a spermicidal foam, or not have sex. After stopping methotrexate, women must continue to use birth control or not have sex until they have had at least 1 menstrual period after their last dose. Men should use birth control or not have sex for 3 months after their last dose of methotrexate.
If you have a young baby before taking methotrexate, don’t breastfeed him or her while taking this drug.
Questions to ask your doctor
- Is methotrexate the best medicine for my condition?
- What do I need to do before I start taking methotrexate?
- What are serious side effects I should watch for?
- How long will I need to take it?
- What are the risks involved in taking it?
- What happens if my partner or I become pregnant while taking methotrexate?
