The Annals of pharmacotherapy · 2019
Baloxavir Marboxil: The First Cap-Dependent Endonuclease Inhibitor for the Treatment of Influenza.
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Yang Tianrui
Аннотация
OBJECTIVE: To review the pharmacology, pharmacokinetics, clinical trials, and clinical implications of baloxavir marboxil.
DATA SOURCES: A MEDLINE search was conducted using the terms baloxavir, baloxavir marboxil, cap-dependent endonuclease inhibitor, and polymerase acidic endonuclease inhibitor. Additional data were obtained from the prescribing information and relevant guidelines.
STUDY SELECTION AND DATA EXTRACTION: All clinical trials were included.
DATA SYNTHESIS: Baloxavir marboxil exploits a new mechanism of action of inhibiting cap-dependent endonuclease. Baloxavir was shown to be superior compared with placebo and noninferior compared with oseltamivir with regard to the primary end point. Baloxavir was well tolerated in the trials. A second phase III study investigating high-risk patients was completed with positive results. However, the full article is not yet published. Relevance to Patient Care and Clinical Practice: The small amount of literature limits baloxavir's use in certain patient populations. Baloxavir offers advantages such as single-dose regimen, eliminating adherence concerns and lack of cross-resistance, making it an alternative for resistant viruses. Several uncertainties remain. Baloxavir has not been studied in hospitalized patients, patients with symptoms for >48 hours, or in combination with other antiviral agents. Furthermore, resistance to baloxavir can develop after 1 dose. Clinical studies are ongoing to evaluate baloxavir in young pediatric patients, hospitalized patients, and in combination therapy with neuraminidase inhibitors to further elucidate baloxavir's place in therapy.
CONCLUSION: Baloxavir is a new antiviral medication for the treatment of influenza. Given the new mechanism of action, baloxavir may be useful in treating patients with resistant viruses.
DATA SOURCES: A MEDLINE search was conducted using the terms baloxavir, baloxavir marboxil, cap-dependent endonuclease inhibitor, and polymerase acidic endonuclease inhibitor. Additional data were obtained from the prescribing information and relevant guidelines.
STUDY SELECTION AND DATA EXTRACTION: All clinical trials were included.
DATA SYNTHESIS: Baloxavir marboxil exploits a new mechanism of action of inhibiting cap-dependent endonuclease. Baloxavir was shown to be superior compared with placebo and noninferior compared with oseltamivir with regard to the primary end point. Baloxavir was well tolerated in the trials. A second phase III study investigating high-risk patients was completed with positive results. However, the full article is not yet published. Relevance to Patient Care and Clinical Practice: The small amount of literature limits baloxavir's use in certain patient populations. Baloxavir offers advantages such as single-dose regimen, eliminating adherence concerns and lack of cross-resistance, making it an alternative for resistant viruses. Several uncertainties remain. Baloxavir has not been studied in hospitalized patients, patients with symptoms for >48 hours, or in combination with other antiviral agents. Furthermore, resistance to baloxavir can develop after 1 dose. Clinical studies are ongoing to evaluate baloxavir in young pediatric patients, hospitalized patients, and in combination therapy with neuraminidase inhibitors to further elucidate baloxavir's place in therapy.
CONCLUSION: Baloxavir is a new antiviral medication for the treatment of influenza. Given the new mechanism of action, baloxavir may be useful in treating patients with resistant viruses.