Lack of interaction between methotrexate and penicillins.
D001172:Arthritis, Rheumatoid / Q000188:drug therapy / Q000378:metabolism*; D004347:Drug Interactions; D005436:Floxacillin / Q000494:pharmacology* / Q000627:therapeutic use; D006801:Humans; D007166:Immunosuppressive Agents / Q000493:pharmacokinetics*; D008657:Metabolic Clearance Rate; D008727:Methotrexate / Q000493:pharmacokinetics*; D010406:Penicillins / Q000494:pharmacology* / Q000627:therapeutic use