Trimethoprim (as sulfate) 1 mg, polymyxin B sulfate 10000 Units/mL; oph. soln; contains benzalkonium chloride. Trimethoprim is a synthetic antibacterial drug active against a wide variety of ...

Max 60mL/day. History of drug-induced immune thrombocytopenia with use of trimethoprim and/or sulfonamides. Megaloblastic anemia due to folate deficiency. Children <2 months. Marked hepatic damage.