Great for you Pud's friend.
I was on Avonex first and was sick as a dog for 3 to 4 days. Chills, fever, aches and pains too. I was working and still had 3 to 4 bad relapses a year.
My liver didn't like the Avonex either so my MS Specialist switched me to Copaxone. The difference was amazing. I was not sick with the flu-like illness anymore. I felt it work in about 5 months.
After two years my relapses were down to two a year. After 3 1/2 years they changed something in it, (fact) I was allergic to. So I had to quit using it, plus it stopped working for me with the new side effects from the allergy to it.
So I am glad you feel so good. Yay! Some people don't get a reaction to the Interferons, others get it mild, and then some get it so bad. That's why we have choices.
There are many drugs out there now and more in the pipeline. Enjoy your new found better health. You can add LDN to Copaxone later on if you want a boost of energy. Just a thought.