Can you take Folic Acid when using Methotrexate for Arthritis?

You must take folic acid with methotrexate because the drug depletes it naturally from the body. Not taking folic acid could lead to severe liver damage. When being treated with MTX regular blood tests should be done to test for toxicity and other problems. ( I take 7.5 mg MTX once a week and 5 mg megafoll folic acid per day. )