I have been on various injectable meds over the past few yrs for my immune system. Unfortunatly they did not stop the progression of my diasease. The meds have terriable side effects in fact the Beta Seron left me with renal insuffiency. What works for one patient may not work for another. Also There are different types of MS. The injectable drugs seem to work for relaspsing remitting forms of the diasease. My stage is considered progressive.