Clinical trial NCT03158831: Drug Challenges Without Prior Skin Testing
Official title: Drug Challenges Without Prior Skin Testing
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE1
Conditions: Drug Hypersensitivity
Penicillin Allergy
Antibiotic Allergy
Keywords: Drug Allergy
Penicillin Allergy
Antibiotic Allergy
Graded Drug Challenge
Lead sponsor: Montefiore Medical Center
Sponsor class: OTHER
First posted: 2017-05-18
Enrollment: 166
Sex: ALL
Minimum age (years): 7
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: Prospective interventional study whereby each eligible patient undergoes a placebo-controlled graded challenge. Each patient receives a placebo prior to undergoing a graded challenge to 1/10 the treatment dose of the challenge drug followed by a full treatment dose of the challenge drug.
Primary purpose: DIAGNOSTIC

Brief summary: The investigators are conducting a prospective study to determine the safety and outcomes of placebo-controlled graded drug challenges without prior skin testing in patients with a low-risk history of antibiotic hypersensitivity reaction based on history alone. The investigators hypothesize that the rate of reaction to graded drug challenges without prior skin testing in patients with a low-risk history of drug hypersensitivity reaction based on history alone will not be meaningfully more than the rate of reaction to placebo. The investigators hypothesize that the rate of adverse reactions to drug challenges without prior skin testing will not be meaningfully more than the rate of adverse reactions with prior skin testing as was observed in the investigators' historical clinic cohort.

Detailed description: Graded drug challenges are the gold standard to exclude an immediate hypersensitivity reaction in patients with a low likelihood of drug allergy and are considered standard of care. Patients who tolerate a graded challenge are deemed to not be allergic to the drug and are not at increased risk for future reactions compared with the general population. Prior studies of graded challenges in appropriately selected patients have demonstrated low reaction rates with symptoms that were mainly mild and subjective in nature. The investigators are conducting a prospective study to determine the safety and outcomes of placebo-controlled graded drug challenges without prior skin testing in patients with a low-risk history of antibiotic hypersensitivity reaction based on history alone. Skin testing requires a separate visit and is, therefore, more time-consuming and costly than performing a graded challenge without skin testing. The investigators believe that they can determine if patients are at low-risk to react to an antibiotic based on a detailed history and, therefore, do not require skin testing prior to a challenge. Given the majority of symptoms to graded drug challenges reported in prior studies were mild and subjective, the investigators hypothesize that the rate of reaction to graded drug challenges without prior skin testing in patients with a low-risk history of drug hypersensitivity reaction based on history alone will not be meaningfully more than the rate of reaction to placebo. The investigators hypothesize that the rate of adverse reactions to drug challenges without prior skin testing will be not meaningfully more than the rate of adverse reactions with prior skin testing as was observed in the investigators' historical clinic cohort. All patients age 7 years or older with a history of a non-life-threatening reaction to an antibiotic are eligible to participate in a placebo-controlled graded drug challenge. The challenge is comprised of placebo followed by 30 minutes of observation, 1/10th of the treatment dose of the antibiotic the patient reported a reaction followed by 30 minutes of observation, and the full dose of the antibiotic followed by 1 hour of observation. All patients will be contacted via telephone within one month of a negative challenge to determine whether they experienced a delayed reaction. All patients will also be contacted via telephone within one year of a negative challenge to determine if they have safely taken the challenge drug.

Eligibility criteria: Inclusion Criteria:

* All patients seven years of age or older who have a low-risk, non-life-threatening history of adverse reaction to an antibiotic.

Exclusion Criteria:

* Patients under the age of seven.
* Pregnant patients.
* Patients with a history of a drug reaction that is high-risk and life-threatening including life-threatening angioedema, bronchospasm, or anaphylactic shock or a history of severe non-IgE-mediated reactions including serum sickness, Stevens-Johnson syndrome, toxic epidermal necrolysis, interstitial nephritis, hepatitis, hemolytic anemia, DRESS, skin and/or oral blisters, hypersensitivity vasculitis, pneumonitis, or pulmonary fibrosis.
* Patients who have taken antihistamines within 3 days of the drug challenge.

Primary outcomes:
measure: Rate of unexpected reaction to graded drug challenges without prior skin testing compared to rate of unexpected reaction to graded drug challenges with prior skin testing.
timeFrame: It is anticipated the study will take 2 years to enroll 200 patients with subsequent data comparison.
Secondary outcomes:
measure: Rate of unexpected reaction to graded drug challenges versus placebos
timeFrame: Patients are monitored for 1 hour after completion of their drug challenge.
measure: Rate of unexpected delayed reaction to graded drug challenges
timeFrame: Patients are called within 1 month of their challenge to determine if they had any delayed reactions.
Other outcomes:
Locations:
city: Bronx
country: United States
facility: Montefiore Medical Center
state: New York
Study officials:
affiliation: Montefiore Medical Center/Albert Einstein College of Medicine
name: Elina Jerschow, MD, MSc
role: PRINCIPAL_INVESTIGATOR
References:
citation: Iammatteo M, Ferastraoaru D, Koransky R, Alvarez-Arango S, Thota N, Akenroye A, Jerschow E. Identifying Allergic Drug Reactions Through Placebo-Controlled Graded Challenges. J Allergy Clin Immunol Pract. 2017 May-Jun;5(3):711-717.e2. doi: 10.1016/j.jaip.2016.09.041. Epub 2016 Nov 23.
citation: Iammatteo M, Blumenthal KG, Saff R, Long AA, Banerji A. Safety and outcomes of test doses for the evaluation of adverse drug reactions: a 5-year retrospective review. J Allergy Clin Immunol Pract. 2014 Nov-Dec;2(6):768-74. doi: 10.1016/j.jaip.2014.08.001. Epub 2014 Sep 10.
citation: Macy E, Romano A, Khan D. Practical Management of Antibiotic Hypersensitivity in 2017. J Allergy Clin Immunol Pract. 2017 May-Jun;5(3):577-586. doi: 10.1016/j.jaip.2017.02.014. Epub 2017 Mar 29.
citation: Joint Task Force on Practice Parameters; American Academy of Allergy, Asthma and Immunology; American College of Allergy, Asthma and Immunology; Joint Council of Allergy, Asthma and Immunology. Drug allergy: an updated practice parameter. Ann Allergy Asthma Immunol. 2010 Oct;105(4):259-273. doi: 10.1016/j.anai.2010.08.002.