TOPICS: Trimethoprim, sulfonamide, sulfadiazine, sulfisoxazole, sulfamethoxazole, dihydropteroate synthase, dihydrofolic acid, dihydrofolate reductase, tetrahydrofolate, bactrim, gram positive, gram negative, nocardia, salmonella, mrsa, pneumocystis jirovecii, toxoplasmosis, shigella, uti, leukopenia, hyperkalemia, interstitial nephritis, hypersensitivity, granulocytopenia, leucovorin, steven johnson syndrome, kernicterus, hemolysis, g6pd deficiency, photosensitivity, megaloblastic anemia