Tissue Plasminogen Activator (tPA) is a clot-busting drug. It can radically reduce the physical problems after stroke. tPA has been used for years, but not enough. There are 2 things that get in the way of tPA being used more:
1.There is reluctance among some MDs to administer it; they think they may get sued for causing a worse stroke (remember: tPA is only for "block" ischemic stroke, but would make a "bleed" hemorrhagic stroke worse).
2. Survivors often miss the "window" of time tPA is thought to be effective (~3-4 hours). Only about one third of all survivors call 911 after their stroke. That is, very few survivors access emergency care that would be required to administer tPA.
The first issue, above, is discussed here. Irony: MDs are more likely to get sued if they don't administer tPA!
The second issue, this may change. There is new technology and it’s on wheels! Have a look at this vid.
More videos here.