Hi, Jef and welcome to the club. Sorry you have
MS, but I am very glad you are being proactive and taking
Avonex. If I remember correctly, Avonex is titrated (each dose bigger than the last) until you get to the full dose, but the prefilled syringes you get are filled with the full dose amount. There should be some leftover until you get all the way to the full dose.
I've not been on Avonex, but for some reason that sticks with me.