Metoclopramide, Azithromycin, or Nondrug Pretreatment for UGIB to Reduce Second Endoscopy (MANPURSE)

Waihong Chung

Status and phase: Unknown; Phase 2

Conditions: Gastro Intestinal Bleeding; Upper Gastrointestinal Bleeding

Treatments: Drug: Metoclopramide Injectable Solution; Drug: Sodium chloride 0.9%; Drug: Azithromycin Injection

Study type: Interventional

Funder types: Other

Identifiers

NCT03840057

1

Details and patient eligibility

About

Early endoscopy is an integral part of the management plan for patients presenting with clinical signs of severe or ongoing UGIB. An accurate endoscopic diagnosis and successful endoscopic hemostasis is highly dependent on adequate visualization of the entire gastric mucosa. Metoclopramide has previously been investigated as a prokinetic agent to aid gastric emptying prior to endoscopy, but its widespread adoption is limited by a lack of high quality clinical evidence as well as concerns regarding side effects. Erythromycin is currently the only prokinetic agent recommended by the American and the European guidelines for use in selected patients in order to reduce the need for second endoscopy. Its clinical application, however, is limited by risk of arrhythmia, significant drug interactions, and frequent drug shortages. Azithromycin is structurally related to erythromycin, but is devoid of most adverse side effects associated with erythromycin use. Early evidence suggests that azithromycin may be an effective alternative to erythromycin in the treatment of gastroparesis. The current study, an interventional, randomized, triple-blinded, placebo-controlled clinical trial, is primarily aimed to evaluate the effectiveness of azithromycin as a prokinetic agent in the management of UGIB. It is also aimed to further evaluate the role of metoclopramide as a prokinetic agent in this setting. Outcome measures to be collected in this study include the need for secondary endoscopy, overall mortality, transfusion requirement, length of stay, requirement for surgery, and incidence of adverse side effects. Results from this study would help identify a safe, effective, and readily available prokinetic agent to be used prior to endoscopy.

Enrollment: 435 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 1. Adult patients ≥ 18 years of age at the time of presentation;
• 2. Admitted to Rhode Island Hospital (RIH) emergency room or inpatient services;
• 3. Presented with hematemesis, coffee ground emesis, or melena;
• 4. Upper endoscopy is planned within 24 hours of presentation or onset of bleeding.

Exclusion criteria

• 1. Known anaphylactic allergic reaction to erythromycin, azithromycin, and/or metoclopramide;
• 2. Concurrent use of certain medications associated with tardive dyskinesia (TD):
• a. Fluphenazine,
• b. Haloperidol,
• c. Loxapine,
• d. Paliperidone,
• e. Perphenazine,
• f. Pimozide,
• g. Risperidone,
• h. Thiothixene,
• i. Trifluoperazine;
• 3. Concurrent use of certain medications associated with torsade de pointes:
• a. Amiodarone,
• b. Chlorpromazine,
• c. Disopyramide,
• d. Dofetilide,
• e. Methadone,
• f. Procainamide,
• g. Quinidine,
• h. Sotalol;
• 4. Known history of TD, ventricular arrhythmias , or long QT syndrome;
• 5. Already received erythromycin and/or azithromycin within the past 10 days, or metoclopramide within the past 4 days for other indications;
• 6. Recipient of hematopoietic stem cell transplant;
• 7. History of Neisseria gonorrhoeae infection;
• 8. Pregnancy;
• 9. Prior gastrectomy.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Sequential Assignment

Masking: Quadruple Blind

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435 participants in 3 patient groups, including a placebo group

Azithromycin

Experimental group

Description:

Participants randomized to the azithromycin arm would receive 250mL of reconstituted solution containing 500mg of generic azithromycin to be administered as a slow intravenous infusion over 1 hour by the primary team 30-120 minutes prior to endoscopy. No dosage adjustment is made for those with hepatic or renal impairment. No dose adjustment is made for geriatric population.

Treatment:

Drug: Azithromycin Injection

Metoclopramide

Experimental group

Description:

Participants randomized to the metoclopramide arm would receive 2mL of solution containing 10mg of generic metoclopramide to be administered as a direct intravenous push by the primary team 5-60 minutes prior to endoscopy. No dosage adjustment is made for those with hepatic impairment. A 50% dose reduction is made for those with creatinine clearance of less than 40mL/minute. No dose adjustment is made for geriatric population.

Treatment:

Drug: Metoclopramide Injectable Solution

Placebo

Placebo Comparator group

Description:

Participants randomized to the placebo arm during Part 1 (azithromycin) of the study would receive 250mL of 0.9% sodium chloride solution to be administered as a slow intravenous infusion over 1 hour by the primary team 30-120 minutes prior to endoscopy. Participants randomized to the placebo arm during Part 2 (metoclopramide) of the current study would receive 2mL of 0.9% sodium chloride solution to be administered as a direct intravenous push by the primary team 5-60 minutes prior to endoscopy.

Treatment:

Drug: Sodium chloride 0.9%