The purpose of this study is to compare four different analgesic strategies in adults undergoing routine influenza immunization
In this study, we will compare relative effectiveness of 4 analgesic strategies (i.e., topical local anesthetics, vapocoolant spray, tactile stimulation and distraction) in adults undergoing routine immunization in order to provide further evidence of the effectiveness of each intervention and to determine if one method is superior to another. We are not including a 'no treatment' group because we do not wish to subject participants to unnecessary pain when there are available analgesic treatments. Moreover, in the presence of a 'no treatment' group, we cannot rule out a placebo effect for all treatment groups unless we provide a matched placebo for each intervention, which is not feasible. In future studies, we plan to address the added benefit of combining analgesic interventions (i.e., evaluating the effect of a multimodal approach).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
352
4% cream; approximately one gram applied to injection site under an occlusive dressing for 20 minutes prior to injection
medium stream spray on arm for 4-10 seconds prior to injection
rubbing adjacent to the injection site before and during injection
The Hospital for Sick Children
Toronto, Ontario, Canada
Pain from adult intramuscular influenza virus injection
Time frame: 1 day
Adverse Events
Time frame: 1 day
Anxiety
Time frame: 1 hour
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