whether EpiPen and Twinject needles are long enough to give epinephrine IM

September 2009

There's some concern about whether EpiPen and Twinject needles are long enough to give epinephrine IM...especially in overweight patients.

These needles are only 1/2 to 5/8 inches long. A one inch or longer needle is usually needed to get into the muscle.

Epinephrine can be given subcutaneously or IM for anaphylaxis.

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