Infusion or pills?

20 yr MS'er here. Very managable for 16 yrs which is when i began Aubagio. After 18 months we had to stop it. Every side effect listed I had tenfold. I know thats what progressed my MS drastically. Its been 2 yrs so its out of my system now. This past yr has been a downward spiral with my MS. 6 new lesions since my last MRI 18 months ago. My doc wants me to start meds ASAP but i am very Apprehensive taking any new MS meds as Aubagio was farely new when i started. Anyway after my long winded explanation. Wondering general Consensus between infusions and pills.