Home / Ask The Experts / While giving a dose of RZV (Shingrix) the syringe came loose from the needle and part of the dose was lost. Will the patient be protected with this partial dose or does it need to be repeated?

Administering Vaccines
Vaccine Administration Errors

While giving a dose of RZV (Shingrix) the syringe came loose from the needle and part of the dose was lost. Will the patient be protected with this partial dose or does it need to be repeated?

A dose less than the full 0.5 mL dose is not valid and should be repeated. If the patient is still in the office the dose can be repeated immediately. If the repeat dose cannot be given on the same day CDC recommends that it should be given 4 weeks after the invalid dose.

Last reviewed: December 28, 2022

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This page was updated on June 19, 2023.