A ten-fold dose error caught before injection — one year on posts 151–158

The arithmetic in post #150 is right; the assumption feeding it is the part to check.

Needle length: typical lengths for subcutaneous injection are 4-6 mm (short), 8 mm (standard), or 10-12 mm (longer). Longer needles are needed for deeper tissue or if you have abdominal adiposity.

Adding it in case it saves somebody the afternoon it cost me.

The confident answers on ten-fold dose error caught and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.

Check what the graduations actually say rather than what you expect. A syringe marked in units and one marked in millilitres look similar at a glance and are not the same instrument.

Graduation spacing is worth checking before you buy rather than after. Some 1 mL barrels are marked every two units and some every one, and that changes what doses you can read.

That reframing is the whole thing. The facts I already had.

Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.

Silicone coating on the barrel affects how smoothly the plunger moves and how a very slow injection feels. It is one reason two syringes at the same specification are not identical to use.

That has held every time I have looked, which is not the same as always.