Stroke drugs, to be given within 3-4.5
hours from stroke:

A stroke is an interruption of the blood
supply to any part of the brain. A
stroke is sometimes called a "brain
attack."

TPA CLOT BUSTER FOR IMMEDIATE
TREATMENT OF STROKE
Tissue plasminogen activator (tPA) is a
thrombolytic agent (clot-busting drug).
It's approved for use in certain patients
having a heart attack or stroke. The
drug can dissolve blood clots, which
cause most heart attacks and strokes.
tPA is the only drug approved by the
U.S. Food and Drug Administration for
the urgent treatment of ischemic stroke.

Studies have shown that tPA and other
clot-dissolving agents can reduce the
amount of damage to the heart muscle
and save lives. However, to be
effective, they must be given within a
few hours after symptoms begin.
Administering tPA or other
clot-dissolving agents is complex and
is done through an intravenous (IV)
line in the arm by hospital personnel.
tPA can only be given to a person
within the first three hours after the
start of stroke symptoms
tPA or other thrombolytics can reduce
disability from a heart attack or stroke,
but there is also a higher risk of
bleeding.