Efficacy of Montelukast in Reducing the Incidence and Severity of Monoclonal Antibodies Associated Infusion Reactions

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    University of California, San Francisco
Updated on 2 March 2022


The use of monoclonal antibodies (MA) either alone or as part of chemoimmunotherapy in oncology, benign and malignant hematology is expanding. Of the 17 therapeutic MAs approved in 2017 by FDA, 50% of them are indicated for hematologic and oncologic condition. With increasing number of approved agents, therapeutic MAs have become one of the fastest growing areas in the management of benign and malignant hematologic condition. Advancement of recombinant technology allows development of partially or fully humanized new agents. Despite this, they still carry significant risk of immune and non-immune mediated adverse events. Most of the therapeutic monoclonal antibody related adverse events (MCAAE) The severity of reaction is variable, ranging from mild involvement of single organ to severe and life-threatening reactions requiring hospitalization or even resulting in death.

Even for mild infusion reactions, where re-initiation of infusion is possible, there is resultant delay in delivery of infusions, distress to patients, and additional utilization of health care resources.

Due to unpredictability of standard infusion reaction (SIR), efforts have been focused on premedication to decreasing the incidence and severity of infusion reaction. Most institutions have protocols using corticosteroid, acetaminophen and antihistamine as part of their premedication protocols. This has reduced but not eliminated standard infusion reactions. Most recently, mast cell stabilizers are being added to standard protocols to further reduce the incidence and severity of standard infusion reactions with variable anecdotal success without formal study. Of all the monoclonal antibodies, only Daratumumab has been evaluated using this strategy.

This study seeks to evaluate the efficacy of mast cell stabilizer Montelukast (SINGULAIR) 10 mg in decreasing the SIR in patients receiving therapeutic MAs either alone or as part of chemoimmunotherapy in hematologic condition. The MAs being studied includes: Blinatumomab (BLINCYTO, Amgen Inc.), Daratumumab (DARZALEX, Janssen Biotech, Inc.), Elotuzumab (EMPLICIT, Bristol-Myers Squibb Company), Gemtuzumab (MYLOTARG, Pfizer Inc.), Obinutuzumab (GAZYVA, Genentech USA, Inc.), and Rituximab (RITUXAN, Genentech US); The investigators postulate that 10 mg of Montelukast, when given in addition to standard premedication, will lead to decrease in incidence of MA associated SIR, shorter infusion time and decrease use of additional health care resources


Study design:

This is a Phase II single arm open label study evaluating 10 mg Montelukast given at least 2 hours prior to infusion of monoclonal antibody in addition to standard premedication. Monoclonal antibodies being evaluated include those commonly used to treat hematologic and oncologic malignancies like (Blinatumomab, Daratumumab, Elotuzumab, Gemtuzumab, Obinutuzumab, and Rituximab).

Arms/Intervention; Study subjects will be given 10 mg of Montelukast to be orally self-administered at least 2 hours prior to beginning of chemotherapy section Standard premedication will be administered according to institution protocol

Condition Infusion Reaction, Monoclonal Antibody
Treatment Montelukast 10 Mg Oral Tablet
Clinical Study IdentifierNCT04198623
SponsorUniversity of California, San Francisco
Last Modified on2 March 2022


Yes No Not Sure

Inclusion Criteria

Patients must be at least 18 years
Able to provide consent for study participation (English and Spanish)
Patients with hematologic disorders or malignancies starting on any of the following monoclonal antibodies alone or in combination with chemotherapy (Blinatumomab, Daratumumab, Elotuzumab, Gemtuzumab, Obinutuzumab, and Rituximab)
Able to tolerate leukotriene antagonist including Montelukast
Able to tolerate oral intake
Available for follow up by phone and on site

Exclusion Criteria

Patients undergoing treatment with above monoclonal antibodies for indications other than stated in above eligibility criteria
Patients who cannot provide informed consent in English or Spanish
Patients taking Montelukast or other leukotriene antagonists for other indications at the time of screening
Known allergic reactions to Montelukast or other leukotriene inhibitors
On monoclonal antibodies other than the ones being studied (Blinatumomab, Daratumumab, Elotuzumab, Gemtuzumab, Obinutuzumab, and Rituximab)
History of uncontrolled depression or suicidal ideation or psychiatric illness
Known Severe Hepatic Impairment (AST>10x ULN; ALT>10x ULN; ALP>10x ULN; and/or Bilirubin >5x ULN)
Patient with eosinophilic vasculitis
Unable to comply with phone or in person follow-up
Patients participating in another clinical trial
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