Avonex Drug Reaction

Hi. Im just wondering if anyone else has had any problems with Avonex. I have just been diagnosed with a Lichenoid Drug Eruption through using Avonex. My back has been covered in large hive like spots over the last year, they are very itchy too. Ive never heard of anything like this. I had this diagnosed through Teledermy and am due to see a Dermatologist in December. I have been on Rebif also for a couple of years, then went onto Avonex as I was suffering bad side effects from the Rebif. Hope to hear from someone lol xx