Learn this one as soon as the Level 2 bench is down. The blueprint costs little scrap, and it has to come before the large medkit, whose own blueprint only packs syringes into kits. Until it is learned, every heal you carry into a fight still comes out of a crate.
The tile names metal fragments as the main resource, but frags are the easy part. Most of the bill is cloth, some straight into the syringe and the rest inside the low grade fuel, which also wants animal fat. A run past the hemp patch and a little hunting on the way home cover a whole fight's worth.
Order them in twos. One syringe leaves two fuel over from the last batch, while a pair uses the batches exactly and fills one belt slot, since that is all a stack holds. Queue them at the Level 2 workbench before the monument run, not after you've been shot.
Questions
Medical Syringe ×10: how many resources?
Metal Fragments ×100, Cloth ×175, Animal Fat ×75.
Which workbench does Medical Syringe need?
Workbench level 2.
How long does Medical Syringe take to craft?
25 s for one, every step included.
How much scrap does researching Medical Syringe take?