Advice very much appreciated. On the last injection there was a pinprick of blood at the injection site and later an impressive bruise. No ill effects afterwards.
It looks like a very small drop of blood entered the pen. Googling suggests there is an anti bacterial agent in the liquid as it is a multi use pen so it is safe to continue using, it is stored in a fridge.
Do you have professional knowledge or personal experience of this? Is it safe to continue using this pen?