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North Canton, OH
A 32-year-old female asked:

my mother was given the tdap vaccine in subcutaneous tissue instead of a muscle. is it still effective if given sq instead of im?

2 doctor answers4 doctors weighed in
Dr. James Ferguson
Pediatrics 46 years experience
Delayed response: The intramuscular administration allows for a more rapid & dependable dispersion of the vaccine and typical response. Sub q administration can go into fatty tissue with less blood supply & will likely slow the response to the vaccine. It should eventually be fine.
Dr. Yash Khanna
Family Medicine 57 years experience
Yes it is: Yes it is still effective as it will eventually get absorped in the blood stream

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Last updated Oct 23, 2017
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