emergency room TPA what's that but a window of like three hours to give TPA TPA is like Drano for the brain right it is a clot buster it dissolves blood clots so it would make a lot of sense that if a stroke is caused by a blood clot like 85% of them are that if you could dissolve that clot and make it disappear quickly that you could make the patient better so TPA is a clot dissolve it's made by Genentech just up the road and that is the mainstay of treatment that was the first treatment ever proven to be effective for stroke the amount of