EpiPen Dose — MFDS Part 1 MCQ

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EasyPharmacologyEpiPen DoseMFDS Part 1

Which pair correctly states the single dose of adrenaline delivered by the standard EpiPen and by EpiPen Jr, respectively?

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Correct answer: B — 300 micrograms; 150 micrograms

The standard EpiPen delivers 0.3 mg (300 micrograms) of adrenaline intramuscularly, whereas EpiPen Jr delivers 0.15 mg (150 micrograms). Current UK SmPCs recommend EpiPen Jr for children weighing 7.5–25 kg and the standard EpiPen for those weighing more than 25 kg, so the distinction is weight-based rather than simply “adult” versus “child.” A 500-microgram dose is used for most adults when a healthcare professional treats anaphylaxis using adrenaline 1 mg/mL from an ampoule or pre-filled syringe, but it is not a marketed EpiPen dose. The other dose pairs do not correspond to the available EpiPen and EpiPen Jr strengths.

Reference: Viatris, EpiPen Adrenaline (Epinephrine) 0.3 mg Auto-Injector, Summary of Product Characteristics, section 4.2, updated 10 August 2026. https://www.medicines.org.uk/emc/product/4289/smpc