Broad-spectrum Rapid Antidote: Varespladib IV to Oral Trial for Snakebite (BRAVIO)

Ophirex

Status and phase: Completed; Phase 2

Conditions: Envenoming, Snake; Snakebite

Treatments: Drug: Varespladib intravenous form; Drug: Placebo intravenous form; Drug: Placebo - oral form; Drug: varespladib-methyl- oral form

Study type: Interventional

Funder types: Industry

Identifiers

NCT05717062

FD-R-7830 (Other Grant/Funding Number)

OPX-PR-03

Details and patient eligibility

About

This is a multicenter,randomized,double-blind, placebo-controlled, phase 2 study designed to evaluate the safety, tolerability and efficacy of a continuous rate infusion (CRI) of IV varespladib followed by transition to the oral dosage form, varespladib-methyl, concurrently with SOC, in participants bitten by venomous snakes.

Note: Funding Source - FDA-OOPD

Full description

This is a multicenter, randomized, double-blind, placebo-controlled, phase 2 study designed to evaluate the safety, tolerability and efficacy of intravenous varespladib followed by oral varespladib, concurrently with standard of care (SOC), in participants bitten by venomous snakes.

Approximately 140 male and female eligible participants will be enrolled and randomized to receive active varespladib or placebo (in addition to SOC)

Randomization will be stratified by the presence or absence of neurotoxicity (SSS nervous system subscore of 0-1 or ≥ 2) at Baseline, and by receipt of antivenom prior to screening, resulting in 4 strata in total.

Enrollment: 140 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Is a male or female ≥ 18 years of age with venomous snakebite.

2. Patients must have known or suspected venomous snakebite. In India, enrollment will be restricted to patients bitten by suspected or confirmed Russell's viper (Daboia russelii) or krait (Bungarus spp.) In the U.S., any snakebite that meets all other criteria may be eligible.

3. Participants must meet one of two categories of inclusion criteria:

   1. Category 1: The participant is enrolled within 5 hours of venomous snakebite or symptom onset with an SSS score of ≥2 in one system and ≥1 in another system (2+1).

      OR

   2. Category 2: The participant has a suspected or confirmed bite from an elapid and is enrolled within 10 hours of bite or symptom onset with moderate to severe cranial nerve or skeletal muscle weakness.

4. Is willing (or legally authorized representative is willing) to provide informed consent prior to initiation of any study procedures.

Exclusion criteria

1. Has history of or is suspected to have CVA or intracranial bleeding of any kind, acute coronary syndrome, MI, or severe pulmonary hypertension.
2. Has known history of inherited bleeding or coagulation disorder.
3. Is, at Screening Visit, using the following anticoagulants: warfarin/coumadin, argatroban, bilvalirudin, lepirudin, apixaban, dabigatran, clopidogrel, prasugrel, ticlodipine or another anticoagulant agent not specifically listed, or has used heparin, enoxaparin, fondaparinux, or other low molecular weight heparin or any antiarrhythmic drugs within 14 days prior to treatment.
4. Has a history of chronic liver disease such as chronic active viral hepatitis, alcohol- related liver disease, non-alcoholic steatohepatitis, non-alcoholic fatty liver disease, hemochromatosis, primary biliary cirrhosis, primary sclerosing cholangitis, autoimmune hepatitis.
5. Reports or has known pre-existing renal impairment or chronic kidney disease.
6. Has a known allergy or significant adverse reaction to varespladib or varespladib-methyl.
7. Is considered by the Investigator to be unable to comply with protocol requirements due to geographic considerations, psychiatric disorders, or other compliance concerns.
8. Is pregnant, has a positive serum human chorionic gonadotropin (hCG) pregnancy test or not willing to use a highly effective method of contraception for 14 days after initial treatment, or is breast-feeding.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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140 participants in 2 patient groups

Varespladib Intravenous Form (IV) + Varespladib Oral tablet (LY315920) + SOC

Experimental group

Description:

Participants will receive intravenous (IV) infusion of varespladib at dose of 0.45 milligrams per kilogram per hour (mg/kg/hr) for six hours. This infusion will continue until when the participant meets clinical criteria for transition to oral drug, -If criteria are met, they will be transitioned to varespladib-methyl (initial dose of 500 mg) then continued oral dosing q12 (once every 12 hours) of 250 mg for the remainder of the study period. Participants that do not meet the criteria for transitioning to the oral drug will remain on the IV infusion at 0.45 mg/kg/hr (along with SOC) and assessed twice a day until they meet criteria for transition to oral drug.

Treatment:

Drug: varespladib-methyl- oral form

Drug: Varespladib intravenous form

Placebo Intravenous (IV) + Placebo Oral + SOC

Active Comparator group

Description:

Participants will receive intravenous (IV) infusion of placebo matched to varespladib for six hours. This infusion will continue until the participant meets clinical criteria for transition to oral drug. If criteria are met, they will be transitioned to the oral placebo then continued oral dosing for the remainder of the study period. Participants that do not meet the criteria for transitioning to the oral drug will remain on the IV infusion (along with SOC) and assessed twice a day until they meet criteria for transition to oral drug.

Treatment:

Drug: Placebo - oral form

Drug: Placebo intravenous form