Most autoinjectors have these parts:
- One or more safety caps. These might protect
the needle guard or the injection button.
- A needle guard over the area where the needle
comes out
- A viewing window to make sure that the shot was given
Some autoinjectors have a button to give the shot. Most autoinjectors are used once
and then thrown away. There are some autoinjectors that have a single-dose
cartridge that can be replaced. For these, the autoinjector is reused and each cartridge
comes with a new needle.
