I used to notice my spasticity quickly reduce in intensity rather soon after my infusions.
I will tell you what my neuro suggested-a slow infusion is better-no quicker than 45 minutes. Also eat a diet low in sodium for a week after your 1st infusion-no more than 2000mg per day. That will help keep the swelling down.
And I always bring some hard candy like cinnamon discs to lessen that icky taste from the solumedrol.
Hope it helps you