Studies of COVID-19 Patients Treated With Oral Bismuth Subsalicylate (Pepto-Bismol) (SABER-C)

University of Cincinnati

Status and phase: Completed; Phase 4

Conditions: COVID-19; Diarrhea

Treatments: Other: Placebo oral tablet without BSS; Drug: Bismuth Subsalicylate 262 milligram (mg) Oral Tablet, Chewable

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT04811339

SABER-C 20.0636

Details and patient eligibility

About

The Center for Disease Control (CDC) and World Health Organization (WHO) have deemed the COVID-19 virus a global pandemic of unprecedented severity in modern times. In 2019, this novel Coronavirus (COVID-19) emerged from the Asian continent and has now caused upwards of 1million deaths and over 6 million infections globally. Currently, the estimated global economic impact is over 5 Trillion dollars. Understanding the host response to pathogens, specifically the cellular and humoral responses, has played an important role in new non-antibiotic therapies. Bismuth subsalicylate (Pepto-Bismol) has a potential role in the clearance and/or recurrence of enteric viral infections.

Full description

Readily available over-the-counter (OTC) medication for symptomatic relief and appropriate oral hydration can be health saving measures of great convenience for those affected by enteric bacterial and viral infections. BSS is a non-proprietary monograph product that is available in the USA and abroad, over-the-counter (OTC). Of all OTC medications for traveller's diarrhea (TD), bismuth subsalicylate (BSS) has the greatest antimicrobial activity against pathogenic bacteria .BSS has also exhibited significant inhibition on viral invasion of host cells and viral efficacy. Both BSS and bismuth oxychloride (BiOCl, which is formed in the stomach after ingestion of BSS) at low concentration (0.004-0.13mg/mL) significantly reduced norovirus (NoV) RNA levels, suggesting an in vivo antiviral mechanism. BSS has also been shown to have antiviral activity since it inhibited replication of 4 strains of rotavirus in tissue culture cells and caused a dose-dependent reduction in the growth of several enteric viruses.

Historically, BSS has been indicated and effectively used for the treatment of TD or enteric infection, mainly when vomiting occurs. Although the safety and efficacy of BSS is well known, some of the research done with BSS resides within the industry and have not been published. We have recently completed an extensive meta-analysis using unpublished clinical studies regarding BSS safety and efficacy. Meta-analyses of randomized controlled clinical trials were performed with studies specifically designed to capture prevention of manifestation and relief of diarrhea.

Enrollment: 60 patients

Sex: All

Ages: 18 to 85 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

To be eligible to participate in the study, patients must meet the following criteria: Ability to provide written or remote informed consent (telephone and DocuSign) Ability to comply with study requirements, Men or women 18 to 85 years of age, inclusive Current diagnosis of an initial occurrence of non-severe, non-complicated COV+ infection as defined by:

• Presence COVID-19 in the saliva using point of care (POC) Qualitative real time - polymerase chain reaction (QRT- PCR) assay.
• Management in an outpatient (i.e., non-hospital) or inpatient setting NOT on a ventilator.
• Alert and awake
• Able to chew the study drug completely.
• Women should fulfill one of the following criteria:
• Answer in the affirmative that "they are not or could not be pregnant"
• Post-menopausal; either amenorrhea ≥12 months or follicle stimulating hormone >20 mIU/mL (milli-International units)
• Surgically sterile; hysterectomy, bilateral oophorectomy, or tubal ligation.
• Women of childbearing potential participating in heterosexual sexual relations must be willing to use adequate contraception from Screening through the 21 Day visit, per Section 10.2.

Standard of care COVID-19 treatment is acceptable.

Exclusion criteria

Patients with any of the following will be excluded from admission into the study:

• Existence of an intra-abdominal abscess, enteric fistula, or symptomatic bowel obstruction
• History of allergy to salicylates.
• History of short gut syndrome, active ulcer or recent history of GI bleeding or melena.
• Systemic chemotherapy for the treatment of cancer during the 60 days prior to consent or planned during the study
• Active use of remdesivir.
• vaccination for COVID within 30 days.
• Current use of drugs that control diarrhea or affect peristalsis (e.g., loperamide. Opiates can be used in hospitalized patients and with outpatients if they are prescribed to a patient), or any anticipated use during the study
• Active drug, chemical, or alcohol dependency as determined by Investigator through history or urine toxicology screen
• Enrollment in any other investigational drug or device study known to interfere with Pepto bismol (bismuth subsalicylate) within the GI tract, within 30 days prior to Randomization (Day 1) or within 5 half-lives of the last dose of the previous investigational compound, whichever is longer. Vaccines are not exclusionary as they do not interfere with the mechanism of the study drug.
• Severe acute illness unrelated to COVID-19
• Pregnant, breast-feeding, or considering becoming pregnant during the study
• Planned hospitalization or surgery during the study
• Any medical, psychiatric, social, or other circumstances that may interfere with study compliance, completion, or accurate assessment of study outcomes

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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60 participants in 2 patient groups, including a placebo group

Open label BSS

Experimental group

Description:

All patients will be assigned to the treatment group for the first 10 patients treated with open label BSS.

Treatment:

Drug: Bismuth Subsalicylate 262 milligram (mg) Oral Tablet, Chewable

Randomized BSS or Placebo

Placebo Comparator group

Description:

The Subsequent 50 patients will be randomized to either placebo or BSS. The patients will be assigned by envelope containing a symbol for either active drug or placebo (or other suitable randomization event) by a member of the research team not directly involved in the clinical trial.

Treatment:

Drug: Bismuth Subsalicylate 262 milligram (mg) Oral Tablet, Chewable

Other: Placebo oral tablet without BSS