my MS center has a 24/10/14 rule.
You must have the symptom for at least 24 hours straight. no breaks in it.
You have 10 days to start IVSM. After ten days the rate of recovery and the relief of symptoms drops back to equal of those that didnt take IVSM.
you have up to 14 days to interviene with some treatments. be it pills, or iv or what ever. after 14 days, your body is going to be over the hump of inflammation, and or flare, and from 14 days forward, its all about recovery. IVSM wont help the recovery then, nor will oral steroids. you should be seeing an improvement in sx or a recovery start. if not, they will repeat an MRI.
I hate this disease! I really do. it has taken so many things from me.