[Current anti-influenza virus chemotherapy]
Daisuke Yoshioka1, Issei Tokimatsu, Hiroshi Ishii
1Internal Medicine II, Oita University, Faculty of Medicine.
Abstract:
The environment surrounding influenza is changing in recent years. In the spring of 2009, pandemic (H1N1) 2009 occurred in Mexico, and became epidemic on a global scale thereafter. Therefore, control of influenza is very important all over the world. Now in Japan, four specific anti-influenza antiviral drugs are available: amantadine, oseltamivir, zanamivir and peramivir. Pandemic (H1N1) 2009 are amantadine-resistant viruses, thus is not recommended for use. Oseltamivir is most commonly used in Japan, however, we have to pay attention to oseltamivir-resistant influenza virus. Almost no zanamivir-resistant influenza virus has been so far reported. In Japan, peramivir is the first drip infusion medicine and is expected to be used in severe cases.
Insights
Pandemic H1N1 influenza requires careful drug selection. Amantadine is ineffective, while oseltamivir resistance is a growing concern, necessitating monitoring of antiviral efficacy.
Area of Science:
- Virology
- Epidemiology
- Infectious Diseases
Background:
- The global influenza landscape is evolving, marked by the 2009 pandemic (H1N1).
- Effective influenza control is crucial worldwide.
- Antiviral drug resistance presents a significant challenge to public health.
Purpose of the Study:
- To review the current status of antiviral drugs for influenza in Japan.
- To highlight the emergence of drug-resistant influenza strains.
- To inform clinical practice regarding appropriate antiviral selection.
Main Methods:
- Literature review of antiviral drug efficacy and resistance patterns.
- Analysis of available anti-influenza medications in Japan.
- Discussion of clinical recommendations for pandemic (H1N1) 2009 and seasonal influenza.
Main Results:
- Amantadine is ineffective against pandemic (H1N1) 2009 due to widespread resistance.
- Oseltamivir is widely used but resistance is emerging.
- Zanamivir exhibits low resistance rates; peramivir offers an intravenous option for severe cases.
Conclusions:
- Antiviral resistance necessitates ongoing surveillance and strategic drug use.
- Oseltamivir resistance is a key concern for pandemic (H1N1) 2009 management.
- Peramivir provides a valuable therapeutic option for severe influenza infections.
Related Concept Videos
Antiviral Nucleoside Inhibitors
Influenza
Antiprotozoal Agents
Inhibitors of Viral Protein Synthesis
Antifungal Agents
Inhibitors Of Virion Release


