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.