Baloxavir in Combination With Oseltamivir in Allogenic Bone Marrow Transplant Recipients With Influenza

Weill Cornell Medicine (WCM)

Status and phase

Terminated

Phase 3

Phase 2

Conditions

Influenza

Treatments

Drug: Oseltamivir

Drug: Placebo

Drug: Baloxavir Marboxil

Study type

Interventional

Funder types

Other

Industry

Identifiers

NCT05170009

20-12023076

Details and patient eligibility

About

This is a randomized, double-blind, placebo-controlled pilot study of the efficacy and safety of baloxavir in combination with oseltamivir (standard of care) for the treatment of influenza in allogeneic stem cell transplant patients. Although there are no data about this treatment option currently available, the investigator hypothesizes that combination therapy may be more effective in clearing influenza virus infection and decreasing the rate of emergence of resistant influenza in immunocompromised human hosts.

Full description

This is a randomized double-blind placebo-controlled pilot study of the efficacy and safety of baloxavir in combination with oseltamivir (standard of care) for the treatment of influenza in allogeneic stem cell transplant patients. 30 SCT recipients will take part in the study. Participants with be randomly assigned (1:1) to either baloxavir + oseltamivir or baloxavir-matched placebo +oseltamivir. Before randomization, patients will be stratified by hospitalization status and influenza type A (yes/no).

Patients in the baloxavir combination arm will receive weight-adjusted baloxavir (40 mg for patients weighing <80 kg and 80 mg for those weighing ≥80 kg) at baseline and at day 4 and day 7. They will also receive oseltamivir 75 mg twice daily for 10 days. Patients in the baloxavir-matched placebo + oseltamivir arm will receive baloxavir-matched placebo at baseline and at day 3 and day 7and oseltamivir 75 mg twice daily for 10 days.

Enrollment

2 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Adult patients: Signed informed consent by any patient capable of giving consent, or, where the patient is not capable of giving consent, by his or her legal/authorized representative
Age greater than or equal to 18 years at the time of signing the Informed Consent Form/Assent Form
Ability to comply with the study protocol, in the investigator's judgment
Have received allogeneic bone marrow transplant
Tested positive for influenza infection after the onset of symptoms using a polymerase chain reaction (PCR)-based diagnostic assay.
Presence of (a) fever (≥38.0 °C per tympanic or rectal thermometer; ≥ 37.5 °C per axillary, oral or forehead/temporal thermometer) or (b) any influenza symptoms (cough, sore throat, nasal congestion, headache, feverishness or chills, muscle or joint pain, fatigue).
The time interval between the diagnosis of influenza and the pre-dose examinations is 48 hours or less.
For women of childbearing potential: Agreement to remain abstinent (refrain from heterosexual intercourse):
Women must remain abstinent or use contraceptive methods with a failure rate of < 1% per year during the treatment period and for 28 days after the last dose of study treatment. Hormonal contraceptive methods must be supplemented by a barrier method. A woman is considered to be of childbearing potential if she is postmenarcheal, has not reached a postmenopausal state greater than or equal to 12 continuous months of amenorrhea with no identified cause other than menopause), and has not undergone surgical sterilization (removal of ovaries and/or uterus). Examples of contraceptive methods with a failure rate of < 1% per year include bilateral tubal ligation, male sterilization, hormonal contraceptives that inhibit ovulation, hormone-releasing intrauterine devices, and copper intrauterine devices. The reliability of sexual abstinence should be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the patient. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or postovulation methods) and withdrawal are not acceptable methods of contraception.

Exclusion criteria

Patients who have received more than 48 hours of antiviral treatment for the current influenza infection prior to screening
Patients who have received Baloxavir for the current influenza infection
Known contraindication to neuraminidase inhibitors
Patients weighing < 40 kg
Patients unable to swallow tablets
Patients with known severe renal impairment (estimated glomerular filtration rate < 30 mL/min/1.73 m2) or receiving continuous renal replacement therapy, hemodialysis, peritoneal dialysis
Patients with any of the following laboratory abnormalities detected within 24 hours prior to or during screening (according to local laboratory reference ranges: ALT or AST level > 5 times the upper limit of normal (ULN) OR ALT or AST > 3 times the ULN and total bilirubin level > 2 times the ULN
Pregnant or breastfeeding, or positive pregnancy test in a predose examination, or intending to become pregnant during the study or within 28 days after the last dose of study treatment
Exposure to an investigational drug within 5 half-lives or 30 days (whichever is longer) of randomization
Any serious medical condition or abnormality in clinical laboratory tests that, in the investigator's judgment, precludes the patient's safe participation in and completion of the study
Known hypersensitivity to baloxavir marboxil or the drug product excipients
Known COVID-19 coinfection
Unwilling to undergo nasopharyngeal (NP) swabs as per study schedule