A Phase II, Multicenter, Randomized, Placebo -Controlled, Study To Evaluate The Efficacy and Safety Of Intramuscular Peramivir 600 mg In Subjects With Uncomplicated Acute Influenza

Inclusion Criteria

• Male and non-pregnant female subjects age ≥18 years.
• A positive Influenza A or B Rapid Antigen Test (RAT) performed with a commercially available test kit on an adequate anterior nasal specimen, in accordance with the manufacturer's instructions. A negative initial RAT should be repeated within one hour.
• Presence of fever at time of screening of ≥38.0 ºC (≥100.4 ºF) taken orally, or ≥38.5 ºC (≥101.2 ºF) taken rectally. A subject self-report of a history of fever or feverishness within the 24 hours prior to screening will also qualify for enrollment in the absence of documented fever at the time of screening.
• Presence of at least one respiratory symptom (cough, sore throat, or nasal symptoms) of at least moderate severity.
• Presence of at least one constitutional symptom (myalgia [aches and pains], headache, feverishness, or fatigue) of at least moderate severity.
• Onset of symptoms no more than 36 hours before presentation for screening.
• Written informed consent.

Exclusion Criteria

• Women who are pregnant or breast-feeding.
• Presence of clinically significant signs of acute respiratory distress
• History of severe chronic obstructive pulmonary disease (COPD) or severe persistent asthma.
• History of heart failure or angina requiring daily pharmacotherapy with symptoms consistent with New York Heart Association Class III or IV functional status within the past 12 months.
• Screening ECG which suggests acute ischemia or presence of medically significant dysrhythmia.
• History of chronic renal impairment requiring hemodialysis and/or known or suspected to have moderate or severe renal impairment (actual or estimated creatinine clearance 10 mg prednisone or equivalent on a daily basis within 30 days of screening.
• Currently receiving treatment for viral hepatitis B or viral hepatitis C.
• Presence of known HIV infection with a CD4 count <350 cell/mm3.
• Current therapy with oral warfarin or other systemic anticoagulant.
• Receipt of any doses of rimantadine, amantadine, zanamivir, or oseltamivir in the 7 days prior to screening.
• Immunized against influenza with live attenuated virus vaccine (FluMist®) in the previous 21 days.
• Immunized against influenza with inactivated virus vaccine within the previous 14 days.
• Receipt of any intramuscular injection with the previous 7 days.
• History of alcohol abuse or drug addiction within 1 year prior to admission in the study.
• Participation in a previous study of intramuscular or intravenous peramivir or previous participation in this study.
• Participation in a study of any investigational drug or device within the last 30 days.