Trimethoprim and folinic acid.
D004359:Drug Therapy, Combination; D006402:Hematologic Diseases / Q000139:chemically induced / Q000517:prevention & control*; D006801:Humans; D002955:Leucovorin / Q000008:administration & dosage*; D014295:Trimethoprim / Q000008:administration & dosage* / Q000009:adverse effects
D014295:Trimethoprim; D002955:Leucovorin