Drug General Information (ID: DDIGFK7XYO)
  Drug Name Polymyxin B Drug Info Inotersen Drug Info
  Drug Type Small molecule Small molecule
  Therapeutic Class Antibiotics Metabolic Agents
  Structure

 Mechanism of Polymyxin B-Inotersen Interaction (Severity Level: Major)
     Increased risk of nephrotoxicity Click to Show/Hide Mechanism Graph
Could Not Find 2D Structure
      Drug Name Polymyxin B Inotersen
      Mechanism Nephrotoxicity Nephrotoxicity
      Key Mechanism Factor 1
Factor Name Nephrotoxicity
Factor Description The combination of drugs that can induce nephrotoxicity may increase the risk of kidney injury. When kidney injury occurs, the inability to remove excess urine and waste from the body can lead to high levels of urea nitrogen, creatinine, and electrolytes (such as potassium and magnesium) in the blood.
      Mechanism Description
  • Increased risk of nephrotoxicity by the combination of Polymyxin B and Inotersen 

Recommended Action
      Management Caution is advised when inotersen is prescribed with nephrotoxic drugs and other drugs that may impair renal function (e.g., aminoglycosides polypeptide, glycopeptide, and polymyxin antibiotics amphotericin B aminosalicylates antiviral/antiretroviral agents such as acyclovir, adefovir, cidofovir, foscarnet, ganciclovir, and tenofovir antineoplastics such as aldesleukin, cisplatin, clofarabine, ifosfamide, streptozocin, and high intravenous dosages of methotrexate chelating agents such as deferasirox, deferoxamine, edetate disodium, and edetate calcium disodium immunosuppressants such as cyclosporine, everolimus, sirolimus, and tacrolimus intravascular contrast media intravenous bisphosphonates intravenous pentamidine high dosages and/or chronic use of nonsteroidal anti-inflammatory agents gallium nitrate lithium penicillamine) . Serum creatinine, estimated glomerular filtration rate (eGFR), urine protein to creatinine ratio (UPCR), and a urinalysis should be obtained prior to initiation of inotersen and regularly during and for at least 8 weeks after treatment in accordance with the product labeling. Inotersen should generally not be initiated in patients with a UPCR of 1000 mg/g or higher, or in patients who are unable to adhere to the recommended laboratory monitoring and management guidelines. Patients or their caregivers should be apprised of the signs and symptoms of glomerulonephritis and to seek medical attention if they occur, including edema, shortness of breath, coughing, hematuria, and decreased urination.

References
1 Cerner Multum, Inc. "UK Summary of Product Characteristics.".
2 Product Information. Tegsedi (inotersen). Akcea Therapeutics, Cambridge, MA.