Hold stadig pennen opad, og pres trykknappen helt op og se om en dråbe IntronA, injektionsvæske, opløsning, fremkommer ved kanylespidsen (Bemærk dråben ved kanylespidsen i Diagram K nedenfor).
Keeping the pen pointing upwards, press the push button up fully and see if a drop of IntronA, solution for injection, appears at the injection needle tip (Notice the drop at the tip of injection needle in Diagram K below).