PRAC to review risk of dosing errors with methotrexate The Pharmacovigilance Risk Assessment Committee (PRAC) has started a review of the risk of dosing errors with methotrexate medicines, used to treat cancers such as acute lymphoblastic leukaemia and various inflammatory conditions including rheumatoid arthritis, juvenile idiopathic arthritis, psoriasis and psoriatic arthritis. When used for inflammatory diseases, methotrexate is taken once a week, whereas for some types of cancer, the dose is higher and the medicine is used more frequently. Mistakes have led to some patients incorrectly receiving a dose every day instead of every week, with serious consequences in some…