Has anyone had any adverse side effects to methotrexate. I got the flu and according to the doctors the methotrexate wasn’t working to fight off any infection and I got mouth sores in my mouth making it hard to talk or eat. All my pills I have to crush. I was in the hospital almost 2 weeks. My blood counts wouldn’t stabilize. Had to have several transfusions. Even had a bone marrow biopsy as they thought I had cancer. After all test came back normal they pretty said it was from an adverse reaction to methotrexate. Anyone else gone through this. It’s painful and I haven’t been able to eat in a while