Hi And welcome!
Men tend to progress faster than women. I know a woman on Tysabri who is having awesome results. Has he discussed this with his neuro? I think if it were me I'd do the tysabri but there are serious problems that happened so you have to be closely monitored. The good thing is it's once a month I.V. and virtually no side effects.
I hope he can make his decision soon. Let us now and please come and ask questions or whatever. Take care!