I’ve never heard of vomiting with avonex before.
If the vomiting is only on injection day, then it is obviously linked to avonex. Do you vomit on any other days apart from injection day?
Is it possible that you get yourself worked up and worried when you are having to inject? Are you scared of needles? or the thoughts of injecting yourself? or do you think it’s the drug itself? A reaction to it perhaps or side effect of the drug?
I was on rebif then now on Tecfidera so have no experience of Avonex but this doesn’t sound right to me. You can’t carry on like this.
Sorry for all the questions but you need help with this. You may need to change dmd. I was on rebif for 9 years and was fine and then suddenly started to feel ill on it so had to change dmd. My neuro said he didn’t know why i reacted like this after such a long time.
I would report your latest episodes to the nurse again. If you are starting to reject the drug they need to know about it.