Today i had Infusion # 32 today.  I feel the energy starting to come back after a draining week.  Tysabri gets infused on a 28 day cycle but has a half life of +/- 14 days.  So most people I know on this drug start to feel like shit the week before their infusion date.  It’s like trying to walk through a pit of bubblegum or molasses.  That’s if you can walk.  There are plenty of other “feelings”.  We Tysabi-ans “jones” for it –but not like crack addicts.  Although I’m sure we bitch about needing it just the same.