Infectious Disease Book

//fpnotebook.com/

Baloxavir marboxil

Aka: Baloxavir marboxil, Xofluza
  1. Indications
    1. Influenza
      1. Alternative to Oseltamivir (Tamiflu)
  2. Mechanism
    1. Cap-dependent endonuclease inhibitor
    2. Some RNA Viruses (including Influenza) replicate via cap snatching
      1. Virus extracts first 15-20 of host RNA residues which is used as 5' cap on virus RNA
      2. Virus RNA polymerase has endonuclease functionality used in cap snatching
  3. Dosing
    1. One single oral dose for over age 12 years
      1. Weight 88 to 176 lb (40 to 80 kg): 40 mg (two 20 mg tablets)
      2. Weight >176 lb (>80 kg): 80 mg (two 40 mg tablets)
    2. Costs $155 in 2019 (contrast with $50 for Tamiflu)
  4. Efficacy
    1. May shorten Influenza symptoms by up to 1 day if started within 48 hours
    2. No evidence for benefit in high risk patients (under age 2, over age 65, pregnancy)
  5. Adverse Effects (in 1-3% of patients)
    1. Diarrhea
    2. Nausea
    3. Bronchitis
    4. Headache
  6. Drug Interactions
    1. Agents that decrease absorption (e.g. calcium including dairy products, aluminum, Magnesium or iron salts)
  7. References
    1. (2018) Presc Lett 25(12): 67
    2. Erlich (2019) Am Fam Physician 100(12): 776-7 [PubMed]

You are currently viewing the original 'fpnotebook.com\legacy' version of this website. Internet Explorer 8.0 and older will automatically be redirected to this legacy version.

If you are using a modern web browser, you may instead navigate to the newer desktop version of fpnotebook. Another, mobile version is also available which should function on both newer and older web browsers.

Please Contact Me as you run across problems with any of these versions on the website.

Navigation Tree