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The needle must
reach the muscle

Intramuscular (IM) injection is recommended for faster adrenaline effect compared to subcutaneous injection4-6

⊤ max : Time at which maximum plasma concentrations were reached (min)

For an IM injection, the UK Resuscitation Council Guidelines for healthcare providers recommend a 25 mm needle for all ages. For small infants, a 16 mm needle is suitable.

“Effective intramuscular injection requires that the needle orifice is wholly within muscle at the time of injection.” 7

Excess subcutaneous tissue may
preclude IM injection1

23 mm insertion depth for 300 and 500 mcg

16 mm insertion depth for 150 mcg