question: I inject myself with 17.5 mg of methotrexate once a week for psoriatic arthritis. My doctor x-rayed and diagnosed me with pneumonia. He prescribed amoxicillin/clavulanic acid oral to start tomorrow. The drugstore information flyer says a bad interaction can occur with these two drugs. My doctor may have forgotten my rheumatologist has me on methotrexate. What should I do?