Phase III Study Showed XOFLUZA (Baloxavir Marboxil) is Effective at Preventing Influenza InfectionSource: Business Wire
– Compared with placebo, XOFLUZA treatment significantly reduced the likelihood of people developing influenza (flu) after exposure to an infected household member –
– Data from the Phase III BLOCKSTONE study will be submitted to health authorities globally –
“This positive Phase III study adds to robust existing clinical data for
XOFLUZA, and is the first to show that a single treatment with XOFLUZA
reduced the likelihood that people living with an infected household
member would develop the flu,” said
XOFLUZA is the first and only one-dose oral medicine approved to treat
the flu, and the first new flu medicine approved by the
XOFLUZA is currently approved in
BLOCKSTONE is a Phase III, randomized, placebo-controlled, post-exposure
prophylaxis study that evaluated a single dose of XOFLUZA compared with
placebo in household members (adults and children) in
Participants enrolled in the study were household members of someone who had been diagnosed with influenza. The participants were randomized to receive a single dose of XOFLUZA (dose according to body weight) or placebo as a preventative measure against developing influenza. The primary endpoint of the study was to evaluate the proportion of participants who tested positive for the influenza virus and had fever, and one or more respiratory symptoms between day one and ten.
XOFLUZA showed a significant prophylactic effect on influenza infection after a single oral dose in people exposed to an infected family member. The proportion of household members who became symptomatically ill following infection with flu was significantly lower in those treated preventively with XOFLUZA compared to those treated with placebo (proportion of subjects with influenza virus infection, fever and other influenza symptoms in the 10-day observation period: 1.9% versus 13.6%, p<0.0001). The incidence of adverse events was 22.2% and 20.5% in XOFLUZA and placebo respectively. No serious adverse events were reported for XOFLUZA. Secondary objectives were clinical efficacy, pharmacokinetics and safety and tolerability.
About XOFLUZA™ (baloxavir marboxil)
XOFLUZA is a first-in-class, one-dose oral medicine with a novel proposed mechanism of action that has demonstrated efficacy in a wide range of influenza viruses, including in vitro activity against oseltamivir-resistant strains and avian strains (H7N9, H5N1) in non-clinical studies. Unlike other currently available antiviral treatments, XOFLUZA is the first in a new class of antivirals designed to inhibit the cap-dependent endonuclease protein, which is essential for viral replication.
XOFLUZA is being further studied in a Phase III development program, including pediatric populations and severely ill, hospitalized people with influenza, as well as to assess the potential to reduce transmission in otherwise healthy people.
XOFLUZA was discovered by
XOFLUZA U.S. Indication
XOFLUZA is a prescription medicine used to treat the flu (influenza) in people 12 years of age and older who have had flu symptoms for no more than 48 hours.
It is not known if XOFLUZA is safe and effective in children younger than 12 years of age or weighing less than 88 pounds (40 kg).
Limitations of Use: Influenza viruses change over time, and factors such as the virus type or subtype, emergence of resistance or changes in viral virulence could diminish the clinical benefit of antiviral drugs. Consider available information on drug susceptibility patterns for circulating influenza virus strains when deciding whether to use XOFLUZA.
Important Safety Information
Do not take XOFLUZA if you are allergic to baloxavir marboxil or any of the ingredients in XOFLUZA.
Before you take XOFLUZA, tell your healthcare provider about all of your medical conditions, including if you:
- are pregnant or plan to become pregnant. It is not known if XOFLUZA can harm your unborn baby.
- are breastfeeding or plan to breastfeed. It is not known if XOFLUZA passes into your breast milk.
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins and herbal supplements.
Talk to your healthcare provider before you receive a live flu vaccine after taking XOFLUZA.
Take XOFLUZA with or without food. Do not take XOFLUZA with dairy products, calcium-fortified beverages, laxatives, antacids or oral supplements containing iron, zinc, selenium, calcium or magnesium.
The most common side effects are diarrhea, bronchitis, nausea, common cold symptoms (nasopharyngitis) and headache.
XOFLUZA is not effective in treating infections other than influenza. Other kinds of infections can have symptoms like those of the flu or occur along with the flu and may need different kinds of treatment. Tell your healthcare provider if you feel worse or develop new symptoms during or after treatment with XOFLUZA or if your flu symptoms do not start to get better.
Please see the XOFLUZA full Prescribing Information for complete safety information.
About Genentech in influenza
Influenza, or flu, is one of the most common, yet serious, infectious
diseases, representing a significant threat to public health. Since
Founded more than 40 years ago, Genentech is a leading biotechnology
company that discovers, develops, manufactures and commercializes
medicines to treat patients with serious and life-threatening medical
conditions. The company, a member of the
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