ve never used them. When I was the
Peg-
Intron in the past, I never used the
pen, I always used the other method of
Peg-Intron (a vial or Prefilled syringe - don't remember which it was). It's been a few years since the Peg-Intron for me. One time, I had this Pen-like device for another medication - not an interferon drug and I did not do well with it. I was a device where you pushed it up against your skin and pushed a button and the drug was dispensed with a 'click' sound...